Thank you Jon for replying and letting us know you are listening!
I know I'll be happy with my ATSF Class A even if I can't run it with another Legacy locomotive. The videos of it show it's a great looking and sounding locomotive, and as one who runs on O36 I am grateful for it.
As for the Heisler, I did want to MU it with a Shay (I need to find one or wait for Lionel to release it.), like you see in videos (And I'm waiting for Lionel to do a Climax too as I can have all 3 loggers.). But it sure does run slow. I haven't ever tried to run it with any of my other Legacy locomotives, as just assumed (Yes I know.) it'd speed up like my B6sb does, but it makes sense that it won't due to gearing.
In the end, now that I know this about these locomotives, I can go enjoy them and not get flustered when they don't function as I was expecting, being I was expecting incorrectly and didn't know it.