I don't consider bitshares to be an enemy or hive or anything, our use cases are very different. And I don't think you need to be 100% on hive to contribute
Abit is very familiar with bitshare's code, which is very similar to hive's code (both share most of the same core infrastructure since hive/steem got created using bitshare as a base). Abit has been useful in bringing external expertise to hive, both doing code reviews, making some code (for instance to calculate who needs to be excluded from the airdrop when we created hive) or helping me figure out some bugs.
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