I would, and I'm actually considering, to offer them $2000 just to compile me Omnifocus 1 (latest of v1 branch) as 64bit app, as it's currently 32bit and can't work due to CatalinaCurse.
Omnifocus 2 was a joke in any category, while I have mixed fealing about 3 (speed, ergonomics, features).
Anyone want to chip in? :)