Hey @Brendyn Dabrowski I think you are on the right track for your list. I would just be weary of over generalizing the areas. For example: Most of Overland Park is in an A to A+ neighborhood for sure, but there are definitely some B areas. The same concept applies for Olathe. Most of the city is an A area but there are definitely B and C areas in Olathe.
Prairie Village is probably the trendiest spot for the average homeowner to buy right now, so I'd likely bump that rating up. One of my investor clients will only buy in PV right now.
Also, in my personal opinion, I think Mission, KS is one of the most undervalued areas in Johnson County. I would rate it much higher than a C+. I think it's an easy B area on it's way to an A. If you can find a good property there, I would seriously consider it. My business partner and I recently lost out on a duplex there and we're still kicking ourselves for not offering more for it.
You also may consider adding Roeland Park, KS to your list. It's in the same ballpark as Mission, KS. Seeing quite a bit of rejuvenation. Plus with the surrounding cities being so popular (Prairie Village, Fairway, Westwood, OP) and the shortage of inventory on the market these 2 areas are getting a lot of the spillover for renters and home buyers.
I can't speak too much on the Missouri side as I mostly focus on Johnson County, KS, but I hope that helps.
Feel free to reach out if you have any specific questions!