Working as a digital business strategist for big & mid-size companies, I'm quite used to project management & business solutions. So here are some 1st-shot analytics & ideas that might help (but you'll know them anyway I guess).
1) Project Work:
The messed-up situation at Nadeo and the bad product quality is clearly a sign for an inefficient & chaotic project management. Even if I don't know any deep insides of Nadeo's daily work, for a business-trained eye a situation like this is quite typical. It doesn't matter how big or small a company is, a functional PM is always important. Mostly those issues are induced by the company lead, so a change has to start there. Now!
Fun story: It doesn't matter if you're a finance enterprise or a French gaming brand - at least it's all about getting stuff done the right way. And: Stuff that COULD be done in a realistic amount of time. 1.000 announced ideas that overwhelms the team, time & budget & appear as a scam to customers (Questmania...) won't work.
Ideas like this might help: Look for "How to Manage a Project: A Very Practical Guide to Shipping Projects Relentlessly" via plan . io
You don't need the latest freaky team work method fresh from Silicon Valley, but a realistic view what's important, possible & urgent to create a nice, functional PM plan. Gogo!
In general, we could be happy that so many nice community people such as Riolu, Miss, Eyebo etc. etc. are an "outsourced" man(and girl-)power that constantly helps rescuing (!) & improving the rather-bad product aka Trackmania all the time. In fact it's a sign for a great community, but it also shows the incapacity of Nadeo to do it themselves & at the first place. Or the second.
2) Customers First:
As soon as you buy a product such as TM2 Stadium for example, you are a customer & a user - no matter how big a "scene" is or how many people bought it before. Fortnite, some indie game, a Logitech mouse, new shoes etc.: Same rules. Always. What means: Customers first! We as customers pay Your office in Issy-les-Moulineaux, the rent of Your UX lead and Your shoes when You're standing next to Zerator on a huge event stage. Never. Forget. That.
Being part of the TM scene for some years now I always have the feeling that a) all Nadeo customers/users are used to be rather Alpha than Beta-testers & b) customers/users always getting misjudged, underestimated and getting for granted next to zero. Testing out new features "live" with a new release is quite common, but not with a semi-ready update built by some outsourced people in the last minute. Monsieur Hylis once said the fatal sentence of all sentences (as far as I remember): "We never should listened to the community." GG. Giving a sh*t about Your customers and Your community (who is always busy to fix Your bad products to the better btw!) is not even embarassing, but fatal. "If You don't like people close Your shop." my favourite bakery boss once said. True.
Funny thing with customers: They don't give a sh*t about bugfixes, half-arsed infos etc. - they just want to have a product that works. Ask Apple - the (still) very Kings of all related things to customer happiness, behaviour & service. Need a hint? Get those annoying creatures called "customers" for granted. They're paying Your food.
3) Marketing:
Through my work in the marketing field some years ago, I did tons of researches for huge companies about their customers, competition & business situation. The most important thing I've learned: A good product is alway the best marketing. And: Sell! Sell! Sell!
Again: The same rules for any product - bread, shoes, toilet paper, cars & games.
Tbh here: I'm ofc not too deep into any marketing plans or numbers of Nadeo, but there's a huge lack of marketing campaigns & actions clearly visible. Even if Your business is quite small & Your budget is rather low, You have to push the pedal to the metal! A good marketing doesn't need to be expensive - but smart. Use Your brain, Your resources and so on. The Zerator thing for example was an important step as was the TMWC this year. BUT: Speaking about "a good product as the best marketing": If You look to my point 1) You might see the problem: A lack of the product quality won't help the people who bought (or potential will buy) TM2 right now. And: Those Zerator-event-influenced & annoying people are customers who are paying Your shoes. Again.
Like I mentioned, I'm bored today. And a bit angry (again) about that shitty Trackmania product situation. But: I'm a professional in my working field, so it's not an "opinion" but a clear & objective analysis so far - even if it's kinda casually. I'm also sure that neither someone issue-related might read it nor that it will find some fertile soil. But I feel better now

glhf & stay fast
*B