I agree with some of what you're saying, Geryth. Some.

Knocking people off cliffs to get kills is not a healthy mechanic, for most all of the reasons you outlined. Though, despite agreeing with you, I'd argue that it's quite possible that the "net fun" of the mechanic could be positive depending on just how much someone enjoys killing people this way.

(Side Note: Word is that DRG can survive being pushed off a cliff via a well-time Elusive Jump. So there may be a single counter to this mechanic, at least.)

All in all, for cliff-pushing, if the one who pushes you does not get credit for the kill (and thus the enemy team does not get points in Slaughter), then the mechanic is acceptable. I'm not sure how it works now, but if it were to work as I just described than that would be fine, imo. Otherwise it's just a cheap way to cheese some points in for your kill count.

As for camping of bases - I disagree. If people are foolish enough to keep running back into an ambush, then they deserve to get stuck in their own base. There are very easy ways around a base camp...camping unless the enemy team had overwhelming numbers there.

As a NIN who rarely ever base camps anyway, I consider it a valid battle strategy.

Your point on CC is true, but your "limits" on their duration are far too extreme. Given the 2.5s base GCD in FFXIV, base duration of sleeps and roots should be 10s, or 4 GCDs. That's a fine amount of time when taking into account what would otherwise be achievable. With the diminishing returns of CC, that duration seems fair to me.