I am not into Marvel and not sure which characters I will be getting in future, but DD is one of my favourites and I am looking forward to adding him in the collection, eventually. The height is sure something I have a concern about; however, not a deal breaker. If the base was the top of a Church or something, he would have been a 10/10 for me.
Since I collect DC and won't be displaying him along with Bats or anyone else ever, still, when I compare him with others he looks quite short. I think if it is a crouching pose, a tall base would actually make more sense.
I thought GL looked strange and puny* between Bats and Supes, DD is even shorter than him. The only way I'd display him would be on the top shelf or elevate him.
*
Hope folks from the GL Appreciation Society will not get after my life for making that statement, just my opinion.