I tend to agree with not attending to these kinds of feature requests with many other things (bug fixes and essential features) still being worked on.
I have no opinion on wanting/needing stacked waveforms to be able to DJ (well I do personally, but that is not relevant) and say to each his/her own.
One other note on that though: if you use visual tools a lot you need to actually look at screen(s). Personally I try to look a the crowd as much as I can. That is where the really valuable information about how you are doing and where you need to be going is gonna come from. Especially at transition time!
That said, this is high(est) end gear, not for starting DJs. For any DJ who ever worked a club set (and this has been true for the last 40+ years) playing without waveforms, with very limited waveforms and/or without stacked waveforms is a way of life. If you depend on stacked waveforms, there is no way you could have played on a club set successfully.
You can of course use a laptop and use a club set as HID-controllers giving you stacked waveform options (with most DJ software). Or you can use one of the controller options available, like the one the OP has used before.
Personally I feel waveforms are a nice addition to have and they provide some easy visual reference. But there is no substitute for knowing your (core) collection intimately. To this day I can tell you the break-up of the tracks I used often in the 80’s. Where vocals started, where breaks where, what intro/outro was there, etx.
With both sync and beat-matching mentioned already I like to add my 2 cents to that as well.
I like using both sync and beat-matching to take away some standard stuff so I can be doing other things and expand creativity. This is the plus of having the technology available. Here I agree with not taking a horse when there are cars available.
By the same token, not every track can be synced/gridded correctly. I’d say, depending on your primary genres, you can hit somewhere between 75-90%. Now you COULD of course opt to not play tracks that can’t be synced/matched correctly, you could opt not to do back2back DJ sessions where you need to take over from the DJ before you and you could decide not to play anything from sources other than your own collection. In my eyes that is a limiting factor. So knowing how to do it when necessary and using technology when it is not gives you the necessary flexibility (don’t care what gear I need to use) and creativity (can use it to maximize efficiency and use freed-up time to do other stuff).
Sure, you can drive around the whole world in a car with automatic transmission, but you’d be f*cked if you don’t know how to stick-shift and end up in a country where the rental company has only manual transmissions available, or if you were invited to experience driving a rally car. It’s still driving a car (not a horse) but you wouldn’t get off the parking lot. Which kinda tends to mess up your journey.