VA, I am unsurprsingly with you on this. His hatred of Glenn appears so intense that it is very hard to believe that he misses the 'camaraderie'. He will do anything to slight Glenn. Objectively it is hard to blame him but sucking up to Henley isn't going to work for him either, not now.
Also as HH says his one contractual obligation album (before Road To Forever) is hardly a 'solo career'. He put it out & then he vanished. The others all worked, with varying degrees of success. Glenn was much more successful as a solo artist than Felder will ever admit.
Congratulations on 1000 posts GS.