Interior isn't great?! What?! It's possibly the best I've ever had or been in. The switches feel great, the upholstery, dash, etc are also excellent and wear very well.
It's all relative - I don't know what other cars you've been in. The interior in the MR2 isn't great compared to 90% of others cars I've been in. It's nothing to get excited about and is quite bland. I'm not nocking the quality of it, though. Good thing it is a drivers car so the looks of the interior shouldn't really be too important.