I have two differing opinions on this.
1 - I more than anything would love him to real put his nose to the grindstone and write some more music AND play it live.
But 2 - And I don't want to sound cold here, but now that the Eagles are no more I want to still be able to hear a lot of those songs any chance I get with any of the guys solo, including Felder. Maybe he should do less of the pre-On The Border ones, but I still like to hear those songs being played by a guy who was in the Eagles, regardless if he was on the record or not as he played them perfectly live so many times. I also realize that it is weird for him to do songs he didn't record on, but it's an Eagles song and I'll take it lol.
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It's a hard choice but I'd be content with him playing all of the songs he played a part in with the band, and save some space for more solo material past, present, and future. Whether it's 50/50 or 75 (Eagles) and 25 (solo). I wouldn't be happy with 75 (solo) and 25 (Eagles) though, I have to be honest.
But I'd hate to see any of the guys solo and only hear one or two Eagles songs. I would be disappointed, I know I would. Heck I saw the LROOE tour and they played all my favorites but one and I was STILL slightly disappointed. Only on the HOTE tour were all of my favorites played.
But when it comes down to it, I'm more a fan of 70s rock music (I have to say I prefer it to any of their solo work), but I'd give any and all new music a chance with me as I have for every solo record.