something I need to understand ...
Frank Noll Jr. said, "For $100 I can teach anyone to hover. Now go buy $100 worth of gas and practice." For us glow fuel guys he may have needed to say $200.
It's all about time in practice.
I like a flapperon mix and sometimes a spoileron. I like either to physically move about 50% of the elevator throw. Not just a 50% mix. Look at the mechanical pieces of the puzzle and maybe a 70% or 30% is needed. If I program an inch of elevator, I like 1/2 of that inch for flapperon. Some folks like a 1:1 mix.
The pitch down will usually happen when there is flap and no elevator. That's the real benefit of flapperons. They mix in proportion and not all at once.
For a replacement... The sky is officially now the limit. There are oodles of planes that will do just fine. The Morris Knife is said to be a good "hover trainer". The Aeron is said to be good too.
Otherwise, build another Fazer, and redesign the tail moment and surfaces. It's just a piece of 1/2 inch balsa. GO FOR IT!