I agree with the OP. From a pld perspective though I think 20 cap on Group 1 isn't enough. Id like to see the cap for group 1 at 50 so you could put 10 into each ability.

Lets face it letting pld stun more isn't really going to do much tbh but it will help with enmity generation.

Holy circle is more or so worthless

Sentinel being able to be casted more often would do some really good.

Cover is a joke in it current form, but it has potential if tweaked.

Rampart is another that has slightly more use if able to be used more often.