I replied promptly to the survey because I actually buy these items. Most recently I bought two Legacy Berkshires. I will buy one of almost any Legacy engine Lionel makes. If they make two road numbers of the same engine I usually get both. I bought three FlyerChief engines to test them out and for possible use on a conventional powered Christmas layout. I ended up having the Berk and The Northern converted to TMCC/Railsounds. Far better than the FlyerChief system.
There is a place for FlyerChief in the market but I will not buy any more.
I do have a preference of new Legacy products. First a Hudson, second a switcher (which will not happen because the current generation of Legacy boards will not fit in an S gauge switcher.) Third, a large rigid wheelbase steamer, fourth an SD40 and finally a small road steamer. How about a Legacy E8 for my passenger trains? Again, I am likely to buy whatever Lionel makes next.
If Lionel chooses to make a large or articulated steam engine then they need to use the O gauge boards with absolute speed steps. So far the only S gauge engine made with absolute speed steps was the Big Boy. While oversize it is by far the best running S gauge steam engine. All 200 speed steps are usable in scale speed operations. On the Challengers only the first 20 are usable, by 30 it will fail to make some curves. Even the Y3 only has about 40 usable speed steps out of 200. The most recent production run of the U33/U36 diesels are quite good, apparently Lionel changed the gear ratios so about 100 speed steps are now usable for scale speed operation. My modified TMCC Mikado's (from the 2005, 6 &7 catalogs) and Light Pacifics have 100 speed steps and 60 to 70 of them are usable up to the prototypes max speed.