More unlocked skills will worsen the difference between a synced and a new player in duty, I guess the few people crying for that on that specific thread, are doing it just because they want end the duty more faster and nothing else.

Anyway, it is obvious that i90-synced players will have too much edge even when synced, and not true it is only player skill difference: when leveling my other tank job I had troubles with them, and when being myself the i90 synced, I found that content threefold more easier to do than when done my first time.

I am thinking the "sync" done to armor and character is still too much forgiving and the synced player still have the edge above another not "synced" player with maxed armor for his level.