I considered some kind of 'piping' extension on the brake bleeder valves for easier access to bleed at the track. For normal street use you don't have to bleed the brakes so often, so not as big a deal. Rear brake pads were a pain to replace in the Jaguars as well, but it could be done (and there was NO access hole to do it)!
I would take a Jag rear end over a Ford IRS unit used in the SPF any time! It's not like the SPF rear's are 'perfect' and 'never' break! I would guess MORE people have trouble with them than the Jag setup. Just try buying a CV joint for one, I double dog dare ya!
