In the end they won't be able to keep balance with so many suits, and theres gonna be a clusterfuck of abilities , and as new ones come out the others will be plagued by old mechanics.
I like the concept or at least the illusion of progression. Once i get to Tier 5 (lets just pretend its the max for the sake of the argument) i can safely forget the other frames before it and focus on that one. Ideally i think it should be like it was Base Recon --> 2 choices of style for Tier 2 --> 2 choices of style for Tier 3 --> 3 choices of style for tier 4 and so forth , eventually reaching max Tier and having 4 or 5 sub types of Rogue within the Recon (a Powerful Sniper, a Saboteur, a melee ninja, a sneaky sneaky guy with decoys, smoke bombs and stuffs etc). That was my vision of the system at least.