I do too. Ep. 9 is one of my personal favourite episodes and that minute long sequence at the end of the two of them working in perfect unison is a thing of beauty. It's a shame we didn't get more episodes where we could see them put that training to good use. The closest thing we got was in Episode 11 where they came up with a battle plan. After that it seems like each Eva battle is nothing but trial and error. This makes sense in the context of the story but a part of me still wishes we got a few more episodes before the more depressing stuff started to happen.
Also a part of me would have loved to see what would have happened if Shinji got to his Unit 01 straight away when the MPE appeared in EoE and he and Asuka fought them together. Of course then, it would be a completely different movie but it would have been one hell of a spectacle. I'm not saying I want to see over-the-top Eva battles like we do in the Rebuild movies but seeing a version of NGE where the two become more skilled pilots over time would have been pretty neat.