Couple things (and I don't squonk) I personally wasn't impressed with the pico's temp control either, although I don't need "TC much" as I am a total wattage weenie and rarely enter temp protect (on any of my mods including the DNA mods). I would note where you feel comfortable vaping in wattage mode, because your TC settings may wind up similar. For example if you've found a build you enjoy (at whatever wattage) sometimes the easiest way to "get" to TC is to replicate your build (I use SS wire for this purpose) using a similar wattage "ramp up" and then depending on how warm or cool you like a vape) that will help you determine your "highest desired" temp and the mod (or squonker) should throttle back when you hit it. So, as you are deciding on your next purchase, I'd recommend finding builds and wattages where you really enjoy the vape, as it should (in theory) help you get to a good set of "TC settings" and etc.
Good luck, many who start squonking don't turn back, which is one reason I don't squonk (although I do have other reasons).
There are non DNA boards that certain makers use (I'm thinking Teslacigs, for one) that do well in TC (well, pretty well and better than the Pico) but really at this point, DNA mods seem to be the way of the future.
Good luck deciding,
Anna