As a paladin I like the Martyrr's idea however, I really would not like to see self heals removed or changed. Just because there are many situations where a paladin is chosen to tank a mob because they don't want ANY damage (mirror golem situations, a certain spires mob comes to mind) and there are many other situations where I would still love my self heals.
People will attest, most of the time I have really no problems keeping aggro whatsoever even on the best DPS in the game (Solosolki / Rein / Dimmi / Kedrin) etc. But I have definitely found AE aggro lately very challenging as really there is only 2 good spells to help address the issue.
Our biggest flaw with aggro, is the inability to target something cast a spell, and it come directly to us (Runic 2 does HELP this issue). You have to land 2-3 spells to take aggro, and by that time the damage has been done, the healer has had to switch to heal a caster or dps, the tank has died to lack of heals because the DPS got his heal, and the raid is bound to be in trouble or wipe.
Heals are supposed to make up for our mitigation difference, but the problem is, if we want to cast them at the time they are needed, 90% of the time that means losing aggro (Before runic 2 especially, I will attest it is harder for sure to keep aggro off of the top DPS on your teir, you need to be doing a complete proper rotation and hope for no resists.)
I think the class itself needs to be overhalled a bit to be balanced with SK's in particular, but I do think adding a little something, or adjusting a few spells could really help. For example making flame of light a bit more aggro, and not have a long recast would be pretty cool.
As for AE aggro, the biggest problem i have usually is when its more than 5-6 targets, could AE blind / stun be for unlimited targets within range ? because i really think that would help a lot.
Not really sure what the solution is overall, but i think having something that would allow us to dps aggro and heal simuntaniously like a martyr's would be a pretty cool add.