Accel products are normally of pretty good quality, but I have heard some stories about Accel ignition coils giving less than stellar service. The complaints I've seen are about EDIS-8 coils used in earlier Ford engines, '90-'94 Lincoln Town Cars to be specific.
If troubles continue with the coils in your ride, I'd contact Accel and seek some relief....or at least an answer so you can avoid future problems with the products.
Boot-to-plug seizure can be avoided by applying copious amounts of silicon dielectric grease to the boot opening that surrounds the plug.
Getting the old boot parts out?? The hard way is the only way. Fashion a hook at the end of a suitable flat-blade screwdriver and use it
to rake out pieces of boot until you can get a plug socket on the plug.....and I KNOW where you're coming from on that @#$%##%@ #4 plug!!