Tell that to the developers resting on their millions, TH11 is coming out with new defences etc - new heroes and probably new troops to add more creativity.
The more you meddle in trying to keep lower tier troops usabie at high level gameplay the more the system and mechanisms will full apart there are plenty of strats out there that you can use for example goarch, gobarch, gobam, gohowi etc. there are plenty of variants and hybrids of theses strategies (and those are just ground attacks) because the parameters are fixed and balanced, and this goes back to the only variable base design layout which requires you to think and come up with a correct attack strategy.

