The idea of TM2 working like CS:GO, which works absolutely amazingly, is good. However, these to games have certain uncommon things which make the idea not to work as excepted. Some might still work tho. Here some comparison:
a) In CS, or in FPS games general, you have a mappack you play. In Trackmania, however, there are hundreds of maps and they're not all competetive. Also, while even Dust II can bring up some interesting strategies, hunting some more ESL Hockolicious wouldn't work.
b) Gun skins, car skins, avatars - these might work. However, teams still need to have their own skins which break the system badly, and also custom skins needed to play some certain map wouldn't work.
c) Amount of players is a big difference. In CS:GO you have already a strong fanbase from Source, 1.6 and other games. In TM the fanbase exists, but it's a way too small to work like CS or TF2.
d) The game needs more players anyway. But we don't need to "get back the stopped players", we need new players. New, fresh players. And we need to keep them, make them fit the existing community. Old players, talk to noobs on servers. Help them. Moreover, it has to be easy enough to players to find the community from Mania-Exchange, Mania-Actu, Maniapark etc.
e) Last but not least, Nadeo is doing good in eSports atm. However, I would make there one change: stadium continuing as main game, but canyon as second. Why? It's a way more exciting to watch than valley or TMUF environments, and that's important in eSport. Canyon also has a lot players who can compete on it. Meanwhile Valley is the environment that work fine in mapping at the moment.
These are ofc just my opinions but I think at least some of them are true as well

wormi27z, wormi, w_rmi, kybermato, Worm, previously from teams [DFF], pls., Don|, PENTA>>, PkD/, [FBR], nyan'