I wouldn't throw the new combat system under the bus quite yet. It definitely has potential -- it's just very rough because it's obviously unfinished.
I agree that it's way too dependent on RNG in its present form, and I have personally felt my own share of frustration with the RNG aspect. Imagine losing to the Trainer Goon three times in a row due to bad rolls. Ughhh...
But RNG combat systems can be fun in their own way because risk management can be fun! The problem is that there is too much risk (enemies consecutively rolling high while you consecutively roll low), and not enough tools available in v0.19.9 to help manage that risk.
I think it would be a good idea to test out the next few releases before casting judgment.