Maybe.  For thrills, I personally find them boring and un-engaging.  The classic EPCOT dark rides were much more thrilling to me than the current slate, save for The Land and SSE...  They engaged my emotions, not just a cheap thrill.  Additionally, I don't want to have to wait until after Illuminations to enjoy EPCOT as I used to.  EPCOT isn't meant to be another MK.  That is why I like it. 
I get what you are saying - that you see things getting better, and a high-quality, well funded Frozen attraction replacing Maelstrom is a step forward.  I know people who think Nemo was a good addition to The Living Seas.  I know people who think Horizons was boring and love Mission:SPACE.  I simply don't agree.
I don't want to lose Maelstrom, even if Frozen is a great IP.  If they want to ADD Frozen somewhere, they should.  I don't see why we have to lose Maelstrom in the process.  I don't buy that a company with assets in excess of $81B can't afford to build a new ride without demolishing/"downgrading" an old one.