I'll never understand how you can place Xenosaga so high and Xenogears so low. Yes, Saga did several things better than Gears and I appreciate those improvements. The most major one of course is keeping all the cast relevant and not letting them just drop off into obscurity. (that was a bad habit of Gears) By and large it also has better dungeons but that's just because XG's dungeons were among the worst in history. There are also other things here and there that I prefer about Saga.
But really, pros don't place it levels and levels above Gears. You praise Xenosaga for having an unrivaled villain lineup and I agree that its cast of baddies was superb. But I cannot see how Xenogears shined any less brightly in that department.
Wilhelm vs. Krelian also isn't a very fair comparison though Wilhelm is a much better character.
And while Xenogears did neglect a lot of its main cast, when they were in focus they tended to be very interesting and awesome. Who can ever forget Maria rushing out to fight her father? Rico's subplot with being the son of the Kaiser was also pretty neat. (if only it went somewhere...)
I would also argue that, apart from Fei and Elly, both Citan and Bart maintained a great deal of importance throughout the plot.
And there's probably more but I'm more than I realized so i can't focus properly. Point is that I'm just baffled by how you can love Saga so much while not liking Gears. To me, they're both so similar that I can't imagine liking one and not the other. I feel the same way when people bitch about Xenosaga being a major letdown compared to Xenogears.