To be very brief and simple. I think limiting skill use is the only way to somewhat balance fights. If you are bad and think you need cds to be even with better players.. well think what you will but you probably won't get better if your solution to lack of skill/movement is to hit the oh #### skills the devs gave you. in my personal opinion based off tons of 1v1s I will give a short list of what skills are good to not use.
Warg hips (I also don't use sprint of tendon shred except for very rare cases but most wargs do so I won't set those 2 in stone)
Warleader quitters and GAG are probably the only things some may frown upon.. kinda limited by ways of cds.
BA MT GAG
reaver wrath ato DR (personally I have no trouble with dr.. cuz they die at the end you get the infamy regardless but whatever, I have gotten QQ)
Champion. Glory traited. sprint sudden defence, true heroics, dire need are pretty much always a no no. depending what you are fighting bracing attack and seeking blade can also be overkill.
Warden. shield line. against basically everything hots, DC, and NS are a no no
Hunter really nothing. I guess some complain about COTH
Mini I'd say stop heal spamming but you will never listen so,.. just cut the flops out on the off chance someone does get you low in spite of your heal spam.
Rks, AOS usually not called for. in many cases PI and WOH are also considered too much.
LM, WOTC. and waterlore in most cases. also that skill that resets most cds should also probably be left out but I forget it's name.
Burg, Ko, tng, R&A and in some cases even some of your chain cc skills is overkill. you may have to go light on cc to keep fights somewhat fair.
Cappy, no LS. I'd say don't just spam heal but like minis this probably falls on deaf ears so.. whatever
Guard, pledge heart deep breath. maybe not sprint
R8 RK, R8 champ, R7 burg, R8 warden. R13 warg, R10 spider, R9 reaver, R8 Warleader R6 BA