Simply put, the easiest way to increase a comparator's signal strength is to use music discs in jukeboxes. However, at this time there's no way of automatically putting a music disc into a jukebox. I'd like for music discs to be able to be put into a jukebox automatically via droppers or hoppers and then played. This could also be of great use to adventure map makers, now that resource packs allow you to edit music discs' contents.
This (In some form) is common suggestion
-hoppers and jukeboxes
-droppers and jukeboxes (I am not sure if this has been suggested before)
-Dispensers and jukeboxes (Before there were droppers)
-redstone jukeboxes (New block)
-redstone jukeboxes (Replay when it gets singnal)
It is very good idea, logical, not OP, there is no reason why not.
It also is old idea, that has been suggested since jukeboxes got implemented.
I think that mojang is will add it in some uppdate. (like coal and redstone blocks, nether brick slabs and sandstone stairs)
It is possible that mojang has something against automatic jukeboxes.
(May be technical problem or just some other reason)