It’s been clearly indicated by Avid that the Io Express and the MXO2 Mini were the beginning of more things to come. AJA seems to have suggested they are working closely with Avid to get support for more stuff, so the near future should be interesting, especially with 64-bit on its way.
For now, if you want to stick with Kona, I’d stick with FCP7, and wait and see what IBC brings us.
Also: before you buy any I/O device for use with Avid, check out the detailed spec sheet for each box:
https://cdn.pinnaclesys.com/SupportFiles/attach/HW-Capabilities_1.2.pdf
It clearly states what features are and are not implemented.
I’d like to bring some nuance to the suggestion that the limitation of features is ‘old Avid’, as just as much of the limitations stem from the capabilities of the third party box, its drivers, or the priority given to any feature by the third party manufacturer. Matrox had limited 24p support at first, but they have improved it in a next release (still no 24p PAL, but at least 1080p24 and PsF24). So things are still changing and very much in progress. The good thing is that AJA, Matrox and Avid appear to be in direct connection with each other on keeping things going and improving on currently supported solutions too.
Finally, I think tech support is pretty OK these days (I hardly ever need it as things just work mostly), but also check out the Avid Community Forums. Marianna Montague (formerly at Media 100) has joined Avid as a Customer Advocate some years ago, and that means fast and direct participation on these forums. She and her team have helped out many customers, no matter the size of their shop. So a lot of that support is available for free.