Are these questions serious?
So what is the problem with these cheap eBay anti scuff sheets? They affect performance? Difficult to apply/remove? Also does anyone know whether these sheet affects the sound you hear of a cricket bat? Would hate to have spent so much money on a H4L only for a dull sound of the bat due to a scuff.
Cheap eBay sheets don't stick very well, get damaged on impact with a ball and leave unholy amounts of residue when you remove them. Buy cheap, buy twice.
As for affecting the sound, it's the same as performance. You're putting a 0.2 mm sheet on there, it will not make a noticable difference!
There has to be a reason why the pros don't put these sheets on their bats
Most pros do use a sheet of some description, and a lot of them like fibreglass ones.