In defense of EDIEM, Lionel's approach toward control has lurched all over the place. Look at all the confusion:
1.Conventional locos that fly away on fixed voltage TMCC / Legacy Tracks
2.Legacy features can't be controlled by a TMCC remote
3. Lionchief locos that mostly can't be controlled by the Bluetooth app, but sometimes can
4. Only new Legacy locos can be controlled by Bluetooth, but otherwise not
5. Lionchief locos sit dead without their special controller
6. Some Lionchief engines work with the universal remote, others not (without firmware upgrade)
7. The iCab app can't control Lionchief or conventional, but can control Legacy / TMCC
I don't particularly care for MTH frankly, but their approach has been consistent with maintaining DCS across their product lines.
Lionel should have never introduced the Lionchief system. It did nothing but confuse and bifurcate the market. People starting out with Lionchief sets have an immediate cost entry barrier to upgrade to Legacy. They should have adopted Legacy as their basic control system, and varied the features depending on the price range of the locomotive.
Worsening matters are those undersized wall-warts that preclude expansion and purchase of accessories. (MTH-you are guilty of this too) In our local train store, people buying Lionchief sets are scared off from buying accessories when they realize they'll need a $150 transformer, or a bunch of those silly and costly plug-n-play cables (which are apparently necessary as we are all idiots who can't strip a wire). Lionel was so blindly cost-driven and desperate to rid themselves of the copper and weight of the CW-80, that they shot themselves in the foot. After all, how do you sell accessories to people while lacking the capacity and convenience of accessory binding posts that are ready to go!
I think the DCS Explorer is an excellent concept which enables the entry level hobbyist to enjoy some continuity while upgrading within the same control system.