Does morale affect skill/spell improvements? If so, how much?
I know there are some items that boosts morale. Is it a good idea to gather them for practicing?

Morale's relevant to xp gain but I don't think it is to skill gain.

Disclaimer: I didn't verify this.

However, I obviously don't have access to the code. I know my felar have seen significant skill learning increases when grouped with other felar (pack sense).

That could just be from group bonus though. Just seemed pretty crazy the skill gains I was getting with that one.

I've attempted to test it by using all morale gear + morale preps, but each time I haven't gone through with it to really test. Usually because I die a dumb death from not having enough hp/hit/dam whatever heh.