Paladins don't get Overpower because they don't need it.
Flash and Riot Blade is more than enough to hold off healer hate. If the DD are focusing several different targets and not the Tanks one .. thats the fault of the DD, not the Tank.

My Warrior isn't yet 50, But theres not a single situation I've been in that i ever thought to myself damn, if only i had Rampart we could of won that! Thrill of Battle gives me nearly 1k HP, combined with Second Wind, i can often use them to survive a blow a Paladin couldn't even with Rampart up.

I know what you're asking, for some more personal customization, but that kind of isn't really possible. Using the Talent systems from from WoW (before and after they butchered it) and RIFT, There was always a 'cookie cutter' build, and builds that just flat out didn't work for any kind of content.
And even some builds that were totally amazing for solo content, but useless in group situations.

What we have now is a small level of choice in subclass skills to take, and there isn't much more they could do to change that due to how unique each class feels from other classes. As an example, despite very similar skillsets, tanking on my Warrior feels very different to tanking on my Gladiator. Which is part of why i chose to level the Warrior first.
My SCH feels way different to my CNJ, and my Monk to my LNC.
Opening up the crossclass skills just blurs the lines on that unique feeling the classes have.

It's unfortunate that you wish to be a special snowflake among Paladins, but really, changing what we have risks breaking the feel of the classes. Giving us stat choices isn't so great either, because it falls into the same trap as the WoW/RIFT talent system, the 'best' build is mathed out and becomes the only acceptable way to play.