Compression angle shouldn't be an issue, even with that angle tweaked. You'll slam the UCA into the top of the fenderwell before you reach the same angle that it see's at full extension.

Changing the joint is easy- remove snap ring, press out, press new one in, replace snap ring.

Based on other uniball UCA's on the market, i'm pretty sure cost is gong to be more than JBA arms.

Cost Vs. Benefit ratio is definitely going to include some personal preference....