While I think the Gemini trains will look a bit odd (even if they are repainted), I am really glad they are getting something better for that ride. When I rode, I could barely fit in the car and it was horribly unconfortable. Because of that, Cedar Creek Mine Ride was my least favorite coaster at Cedar Point (yes, I even preferred Disaster Transport to it). Maybe these new trains will convince me to give it a second chance, although from what I remember it seemed like a fairly boring mine train to begin with.
For the record, I've never had a hard time fitting into any other non-kiddie coaster or any other Arrow mine train.
Top 5 Steel: Bizarro (SFNE), Nitro, Apollo's Chariot, Maverick, Banshee
Top 5 Wood: Boulder Dash, El Toro, Thunderhead, Gold Striker, Lightning Racer
Top 3 Parks: Holiday World, Busch Gardens Williamsburg, Cedar Point
TPR Trips: IntimidaTour 2010, North East Trip 2011, LeviaTHON 2012, Mini Tours 2014 (New Hotness & East Coast)