My thoughts on the noteworthy stages (kinda longer than I expected, sorry):
YI is not "that bad" tbh. I can see it being CP'd in some matchups, I can see why Meep CP'd it in that case. But a lot of characters do well against us there too.
Castle Siege is one of our worst stages. First transformation -can- be good if you get lucky on the startspawn. Left side is really dumb for us, Ice Shot does nothing and Blizzard is easy to get around, also the low plat interrupts fullhop blizz if I remember correct. The lip doesn't help either. The right side is okay though. Second transformation: get homosexually camped by everyone and there's nothing you can do about it, also the walls interrupt blizz/iceshot. If they approach here they're doing it wrong no matter what character they are. Third transformation is FD-esque, except with that kind of tilting crap Lylat has that can either help or hinder (most often hinder), and even gayer lips. This one is fairly OK, except it doesn't last that long. Oh yeah, and the stage can teleport Nana to death when it transforms, I have a replay of it if you want to see. So it has ok points, but overall pretty bad.
Halberd. The first part isn't that hot. The dip foils any attempt Ice Shot has at stopping/blocking other (good) projectiles, also we're susceptible to sharking here. Second trans: pretty good, except for the interruptions. Too bad good players will rarely get grabbed, so any reason we need to get rid of them prematurely isn't good news (although it's not -that- bad, really). btw about the low boundaries: imo it's less of a plus for us than for others. Since we usually kill at the end of a CG then we can get them as high as necessary regardless of boundary distance. Whereas others don't get that luxury, so it helps to have good boundaries. Oh, and Halberd happens to be the best stage of our worst matchup. I'm pretty much going to assume they'll go Snake if they choose Halberd and I won't pick it myself for that reason too. This would actually be an "ok" stage if it weren't for snake.
YI is comparatively better than those, but it is in general just a disruptive stage. The tilting plat and the slopes are in general not that hot, hobbling for example is completely foiled and it makes CGs stricter to time, especially on the side. But otherwise it's ok, as I said I can see us doing well against certain characters.
Cruise is actually pretty good. I don't know what other ICs think about it but I actually like it, the tilting lip doesn't really gay us like it does everyone else and the platforms are almost BF-perfect. The tilting can be annoying if you're at the bottom and it kinda foils CGs in the same way YI does but it's not that bad.
So ICs do not like:
Stadium
Delphino
Halberd
Siege
YI (kinda)
4.5-5/9
Boost stages were perfect imo. One was "pretty good" for us and another was excellent, everyone hates YI but as I said it -can- be good. At Boost I can expect to not play on a terrible stage but not be handed my best stage, which was good, we do well on SV but so do a lot of other characters so I wouldn't really call that handing our best stages to us on a platter. Whereas with the MLG list we are more or less guaranteed a bad stage (or at -least- one we could be CP'd to normally), which really hurts because winning game 1 is extremely important for us given the MANY bad stages we have.
The thing about most of these stages is that they're not technically "terrible" but it's just that characters generally do a lot better than us on them or can abuse their designs.
get @ me