The Following are my thoughts on what made retribution unique in PvP and also PvE.
The reason paladin feels so clunky to me is because divine storm is no longer a part of our single target damage rotation. I am not saying the ability is not the end all to be all for signature retribution paladin abilities. However it just felt so cool to use and i guess it grew on me so much so that when they took it away it left this empty void to be filled that Templar's Verdict does not fill.
Perhaps it was because the only "in melee range" damage ability we had during wrath was crusader strike so most of the time we did not have that "rogue" or "warrior" feel of constantly having to be in melee range to get any damage in. That was the feel that made me love retribution in Wrath of the Lich King and set it aside from all the other melee classes. Currently Crusader Strike and Templars Verdict, both in melee range abilities, are amongst the top damaging abilities a retribution paladin has to offer. The thing that bugs me is that Crusader Strike is the only ability we have that GUARANTEES us one holy power and it is an in melee range ability, unlike Divine Storm.
One thing i think would help bring back some of the feel that i came to crave about retribution is if Divine Storm did not share a cool down with Crusader Strike. Crusader strike, in comparison to Judgement, seal, Exorcism and Divine Storm damage, was kind of low in Wrath of the Lich King. All Crusader Strike really did was refresh your current Judgement on the target and apply the current seal damage. Why can't Divine Storm work the same way? It should be a separate cool down from Crusader Strike, grant one holy power, and also apply the current seal damage active.
They are already making it so more than just Judgement and weapon swings apply seal damage, why not make Divine Storm a separate cool down and grant one holy power? In return they could lower the chance for Divine Purpose to grant a holy power. Divine Storm guaranteeing one holy power is not as important as it being a separate cool down from crusader strike. I think people would still use it for the minor healing it gives and also because it could potentially grant a holy power. I think this would bring back some of the feel that made ret fun for me to play, while not making it a FCFS rotation.
Just my thoughts...