I think she's in the same league as both Super Dash and Fat Han (though she stands up to TLTs better). One of the key differences I've noticed is that she tends to either win or lose big.
As I think I mentioned early in the thread, I played three-of-three against Rey yesterday. I won all three, but (1) all three were close, and (2) when you factor in list-familiarity, I was the best player at the tournament; everybody else was playing Rey pretty much out of the box. All three could have gone the other way -- and the middle one would have, if not for my opponent's super-cold attack dice.
Now that was against Brobots, which are always a little bit of a weird case, but it is three straight games counter to the "win big or lose big" note.
I think Rey is very, very solid. In the hands of a really good player, I think she'll outperform either Fat Han or Super Dash.
I think that may have been the bro bots. In the games I've played/watched (5 played and 2 watched so still not a huge sample size) it's been mostly against either Imperial aces or low agi Rebels. In almost all cases if the first round after the merge Rey could keep every one who could shoot her in her arc she evaporated one of them and went on to win the game. If she couldn't (often due to a block or having her moved constrained by obstacles) she ended up getting pummeled and leaving her partner vs 3 ships. Brobots though have the hps and green dice to not just drop to 5 hits and with the HLCs and B's ability will be consistently doing at least some damage against 2 rerolled greens. So the games became much more about attrition and less swingy. But perhaps that's just he way my games went, considering it was the first time many people were playing/playing against Rey the surprise factor may have increased the volatility.
I completely agree that she's got a higher skill ceiling than Fat Han. He wins just by having decent math on his side and while you can fly him poorly it's not really possible to fly him amazing. Dash on the other hand I've seen some people do some crazy things with. Just dancing that ship between arcs and taking out entire lists receiving almost nothing in return. With the preponderance of Palp aces and Dash's donut hole I'd probably lean towards Rey in the current meta. But I wouldn't say she's strictly superior and depending on how the new U-boatless meta shakes out I could see either being a viable option.