I'm not sure that "exit" is wrong there (from S Hamilton to I-94 E or W). There aren't exit numbers, but it still has all of the characteristics of an exit, including the Big Green Sign. S Huron to I-94 E might be questionable as it doesn't really feel as much like an exit and it only has just a small green sign saying to turn, but even then, I think exit is okay. They may seem odd to someone, but it's still valid, in my opinion. But like CBenson said, we could still avoid that by giving a larger angle to the ramp if that's what we want. Personally, I don't consider any of these to be turns. I'd think of all of them as exits just because of how they look. Sure, you don't have exits within the city itself, but that does seem like an exit to me at I-94.
One thing that does need fixed, though... On S Huron just south of I-94, there is a short segment that is set to Primary Street between the Major and Minor Highway segments. You may have left that because it's locked. If so, just request the fix in the unlock forum or here.
Also, the ramp names do not match the Wiki standards. S Hamilton to I-94 W should include I-94 W / US-12 / Ann Arbor. S Hamilton to I-94 E should include I-94 E / US-12 / Detroit. S Huron to I-94 E should probably include I-94 E / Detroit based on the small green sign. And S Huron to I-94 W should include I-94 W / Ann Arbor. Three of those are based on the BGS, which is how the ramps should be named.
And although I don't think we've really come up with a standard format in Michigan for unnumbered exits, I think "Exit" should be included in the ramp name. The question comes up as to how to name these. "to" is used in ramps to indicate that you're getting onto a road that will take you to another road. It isn't really used for saying that you are turning directly onto that road. But if you say "to XXX" or "Exit to XXX", you end up giving it a different meaning. At that point, how do you differentiate between a ramp that places you directly on I-94 E and an exit that is placing you onto another road that will take you to I-94 E if the ramp just says "Exit to I-94 E" or "to I-94 E"? With exit numbers, it's easy... "Exit 123: to I-94 E" vs. "Exit 123: I-94 E". But without an exit number, it becomes muddled. There is some minor discussion on this and some thought of using a format like "Exit: I-94 E" and "Exit: to I-94 E" depending on whether or not you're directly getting onto the highway or just heading towards it. The downside is you run into longer TTS... "Exit at Exit: I-94 E" or "Exit at Exit: to I-94 E" instead of just "Exit to I-94 E". But it does differentiate between what you're actually doing, so it could go either way. With a numbered exit, it would be "Exit at Exit 123: I-94 E" or "Exit at Exit 123: to I-94 E". So using "Exit:" would fit with numbered exits. It's just a little unusual. Anyhow, it's something I think we may want to discuss at some point. In the meantime, it really doesn't matter which format is used as long as the ramp name includes what's on the BGS.