For pallies, str offers a few more things ..
- No need to own an implement ... with the discussions on archery > 2WF for rangers 'cos they don't need 2 weapons, having a single "attack item" that does it all is significant. (note: holy avengers are nice, but silly high level, and has a +4 level bump, so I'd still go with weapon + symbol at epic, 'cos cheaper = earlier higher enhancement)
- Really strong MC options ... there are so many str based powers out there, cherrypicking the very best via MC is admittedly a plus that requires work, but can be worthwhile. An obvious one is Divine Power (Cleric 9) since paladins have no str-based level 9 power.
- In FR at least, I'm betting we all agree righteous rage of tempus is made of broken. Now, any paladin can make use of it, but pallies get a 4[W] attack at 5th. Sure, it's weaksauce compared to hallowed circle, but auto-crit + high crit weapon + 4[W] is a little bit silly at mid-heroic.
I guess point #3 isn't great, so that can get tossed.
I like #1 a lot, 'cos gear micromanagement can equal additional mechanical advantage. I also like valiant strike a lot ('cos hitroll rules) .. especially if you're also abusing #3 (so your hitroll is lower for not using a sword).
Clarify: Deadly Axe + Waraxe proficiency + Righteous Rage of Tempus = BOOM.