Depends on which zone, and to a point which mobs.
Most of what PLDs tend to do in Dynamis is call mobs - hate rarely stays on them, but mobs also tend to die in seconds. If you have multiple PLDs, the non main callers may try to pull hate on slept mobs and/or statues and the like. A lot of it has to do with the shell/strategy in particular.
DD is fine for a lot of zones, though honestly I don't think it'd really change much unless you're going with a smaller group. Still, the mobs are low enough level that you really don't need to go overboard. Do want to macro in a lot of enmity though, as mages are usually building a fair amount of hate on mobs via Sleep/Aspir/etc.
For Xarc and the like, obviously, you'll be gearing differently. Again, it tends to vary - I've seen some that use PLD/NINs, others that blood tank. Suffice to say that if your LS falls into the latter category, you'll be turtling up there.
Personally I didnt see anything in Dynamis worthwhile for Pld, so I have never gone.
Valor armor may not be the end-all anymore, but it's still decent, and enhances JAs, which other sets don't do. You don't fulltime Valor Leggings, but you macro them in for Sentinel, and so on.
Valor Cape is certainly a nice combo piece. Shadow items are also nice to have as well.
Hydra pieces if you do Tav are still high enmity pieces. Not as far ahead of easier to obtain items now, certainly, but still the best in some cases (body for example).
PLD has a good bit to gain from Dynamis still. It just has a lot of alternatives now as well. Still, no less out of it than most jobs, and more than a number of them.
Probably the one best event for PLD is Proto-Omega anyway. Askar gear is so-so in comparison, Assaults offer basically nothing outside of appraisals.