Concerning the ease of creating new accounts, there are many things that can be done which BOTH:
A. Make creating alternate accounts more effort than it is worth for players who have been playing a while.
and
B. Improve the entire experience of learning the game for actual new players.
This can be done by the following:
1. Beef up the Training. Make it longer, more comprehensive and MANDATORY (without the existing glitch that lets you bypass it)
2. Required, guided tutorial bot matches for all game modes, especially Siege and Missile Assault. Make players complete a full, prompted set of tasks and objectives and WIN the bot tutorial of every game mode... before they can play the same mode online.
3. Quicker recognition and advancement within the MMR system. If a player is new and seems to be coming out on top of the podium more than a regular amount, give the player a quick bump up to a much higher MMR and put them in matches with higher ranked players right away. If they truly are a new player, that could then quickly be recognized and their MMR could be gradually lowered back until their performance actually makes sense.