Tx, I agree. I adore the old engine, in just about all aspects. I actually much prefer not having the shift-D console: it's much too tempting, and I always end up cheating just I bit more than I want to. A2 and A3 are some of my favorite games of all time. I also really like the keypad navigation, the indoor v. outdoor setup, the graphics, ...
I take every chance to rave about it. Not that I hate the new engine.