I would think if you bought a Gen #1 Water Pan, if it didn't fit in the wire holders of the Gen #2, you could just set it on the bottom rack, and pull the slanted drip plate out completely. That was one of the suggestions I gave them. I said to lose the goofy slanted plate & put the same guts in as is in the Gen #1. And move the top vent from the side wall to the back left corner of the top (which they did).
Yes! This is what I just posted a few minutes ago before I got your notification above. I'm confident the oval water pan of the Gen 1 or 2.5 will hang at any level in the Gen 2. I guess a call to MB would solve this. Voila! A Gen 2.5 with RF remote.