resoling and custom ARE done in the good ole US of A by American workers. If you want a new pair assembled in the US order them from rechaco. A tad more, but that's what you can expect from American made.
As far as glue, this is not a new company problem, they have had trouble with the 5.10, stealth, pro, sticky sole for at least 6 years.
The company rocks, they continue to support a program giving shoes to the shoeless. I would say the performance has not changed one bit since I have been wearing and buying their sandals (8 years).