One concern I don’t think I’ve seen mentioned yet is the Frost 2pc might incentivize some degenerate gameplay via ignoring other buttons in favor of repeating oblit.
The scenario I’m imagining is more relevant for breath because oblit is a bit more predictable and less resource flooded.
If you have a rime proc and KM proc at the same time, general wisdom is to use the rime proc first. The odds behind getting a KM proc mean you’re less likely to go back to back, so you consume rime, then the KM and hope for another rime. But, because the 2 pc stands to flood you with KM procs, the set would incentivize you to ignore that rime proc and consume the KM first. This situation is made worse by all the effects that flood frost with runes and procs (ME, KF, ERW, BoS generating extra RE procs, Kyrian lego, etc). While it will be more dps, ignoring other buttons you would normally press in favor of spamming another is usually unhealthy for a spec. (Looking at you Dance of Chiji)
Thats my concern on paper at least. It will ultimately depend on seeing it in game and getting a feel for how often it really grants extra KMs.