Right, lots of points to answer...
Personally, I don't minimum/maximum stats like that, especially to that extent. That's not to say it's impossible to win with such a character though. Sticking to a Ranged Weapon should get you through reasonably.
Your Endurance may well be a big problem though, unless you can find some way to draw off an enemy's attention from your character.
I think all the Sylvant and Feralkin traits mark you as 'tainted' and half of the Demokin's do too. I think playing an untainted Demokin/normal Human is about equal.
Oh, definitely. In fact, having scores above 11 can provide serious benefits. However, the Gain Attribute perks cannot be chosen if that stat is at or above 10 (either naturally or because of an equipped item). If you make sure the stat is below 10, when you want to increase it (e.g. remove stat enhancing equipped items first) then it should e possible to increase it - this has to be done BEFORE the level up and not just before you choose the perk though.
I wouldn't reduce that weight limit, personally, especially if you will be wearing Plate or Full Plate armour in the game. IIRC, those armours weigh around 40.
If you look at the Thieving Skills, there is one called Diplomacy, clicking on that shows two other skills (Barter and Speech), whenever you put pouints into Diplomacy, both Barter and Speech will also increase.
Yeah, I'd say it was. An enemy could deal 100pts of damage over several hits and you will have only regenerated 10. Plus, I think that spell requires 160 Mana to cast, which is very expensive, not to mention the points you need in the branch to cast it in the first place. You could use the skill to suplement Fortitude (Healing) though.
Generally, no. The limits are based on the amount of points you have in a skill branch (e.g. 50 Ranged to use a composite bow).
Not 100% sure on that. Maybe Fljotsdale will be able to shed light on that.
Perception does help quite a bit, but isn't absolutely essential. You amount you have should be more than enough (e.g. I often go for 7 originally).
Those perks are quite useful at times, but I don't know if I'd specifically change things for that reason.
Any chance to get more skill points is generally worthwhile.
I haven't seen anything immune to Crit Hits in the game. As for the Luck roll, I don't know, it's one of those things hidden by the game. It's possible the Luck stat does have an effect on it, but I don't know how much by.
I think I've managed Level 37 before, there isn't a level XP cap as far as I know and it's unlikely you'll ever reach it (unless you export a character mid-way through the game and restart with the character thus gaining the XP twice - but I haven't tested that).
Phew, I think that's it. I hope you can follow all that...
Hopefully, the colour coding will make it an easier read.