Energy capping is a loss of dps. Not a potential loss of dps but an absolute loss. If you cap energy you are no longer regening energy and not regening energy means you're doing less abilities.
The problem with combat is that with absolutely stunning game play. With perfect conditions, not having to hold off on CDs, and super a super low ping you can play like a complete genius with game play that makes Stephen Hawking look like kid with downs syndrome. And what do you get? Out DPSed by the assassination rogue who screwed up his rotation a few times and was chatting with his GF through tells about what movie to go see after the raid. You then proceed to end the fight with lower dps, a tired hand from spamming and a crushed epeen. You bring less to a raid for more work. All these posts about "I like combat because I can't push a CD without thinking about it" are absolutely mind boggling retarded and all I see when I read this is "I like to mash buttons like a monkey but I'm better than you because I like not using an ability and lowering my dps because I have no idea what I'm talking about."
Combat has obvious flaws that need to be addressed. Class flavor that's bad flavor needs to be changed not kept just because it's unique to the class. If a class has a high skill cap it should have a higher dps potential because of it. Spamming buttons with a low ping is not skill thought it just means you can push a button fast. Things like not using KSP on a boss because it will kill you isn't a good class mechanic but a waste of dps. Things like AR + haste + bloodlust energy capping you are a bad mechanic and needs to be addressed. Having to lower the GCD is a bad mechanic because then players with a higher ping get completely screwed as well as the physical effects of sore wrists and broken keyboards. The gear scaling from leveling/fresh 90/max level gear is atrocious and currently and with the proposed changes makes combat absolutely horrible for anything outside of a very well geared character and completely screws it for everyone else and makes it even worse in PvP. It's pretty sad that on shadowcraft combat sims for so high and yet every fight falls 10s of thousands of DPS behind their theoretical dps compared to assassination where it's pretty easy to beat your simmed dps and usually at least meet it on a regular basis.
I think a lot of rogues here think that combat has a higher skill level than other specs and like to think that it makes them better to play it but in reality combat is really just mashing buttons faster and not using an ability and pulling in less numbers than other people.
Major changes need to be made to this class to bring it up to par not just these little band aid patches. None of them solve the core issues of the class and why they're falling behind.