On PC, all premium players have access to the CTE servers and the CTE forums for a few months now. These servers contain updates made by Dice that can be used as feedback by the players. Some of these updates include improvements to rush M-COM placements, weapon and gadget balancing new camos and knives as well as the option to change our parachute camo as well and improved movement acceleration for soldiers. Unfortunately there will be changes that won't be as great but the patch will be hopefully big.
These are the recent updates on CTE mainly focusing on gun/gadget balancing.
[url=https://www.youtube.com/watch?v=kQn5rl7a1kQ]CTE update 1[/url]
[url=http://battlelog.battlefield.com/bf4/forum/threadview/2955065233670376639/]CTE update 2[/url]
[url]http://blogs.battlefield.com/2014/08/updates-battlefield-core-gameplay-improvements/[/url]