Those are perfectly acceptable, i do not consider those to be gimmicks, when i say gimmicks, i generally mean the Modifiers, that alter the Game in some stupid way, mostly because of the way they combine them, like specialist and juggler, or grounded and airborne. But mechanics, like crowd controls, AoE's ground pounds, multiple weapons would be great. And detainment bubbles are not bad as long as they are Templar/Atheon ones and not Qodron ones.