@thwill may have some thoughts on the BASIC syntax in MMBasic.
Also, any plans to share your ported BASIC programs? It would be nice if Clockwork had a place to collect and share code, but realistically it will just be mentioned here (and potentially buried) in the forums, and also scattered around at github and the like. That’s been the general process for the Gameshell, Devterm, and uConsole. 
If you get tired of the Pico in your PicoCalc, there are a myriad of other modules that work in the PicoCalc, all in early stages of development or being considered:
I wouldn’t be surprised if other compatible hardware appears. Someone will probably get the Waveshare module working too, as it’s been mentioned several times, and probably others that have yet to be discovered or perhaps even released.
Most, if not all of these modules are more powerful than the Pico/Pico2 hardware and are plug-in replacements for it. The only thing currently missing is software, but the ESP32-S3 and Luckfox Lyra are already being successfully used in various ways. And I’m sure more sottware will appear for the Pico hardware itself too. Like all Clockwork products at release, we’re currently in the “bare minimum” of software phase. Things don’t usually pick up steam until community members start their own projects and release them. I’m guessing at some point PicoMite for the PicoCalc will be updated to the newest version and also have the WEB commands added, among other things. And probably other software will be ported and adapted as well. Things will probably look very different in 6 months to a year. For now, PicoCalc owners are all just alpha/beta testers with really cool hardware that has lots of potential. 