When the enemy captures a built up base, they are immediately able to delete the entire base in seconds. Number one, this is unrealistic, and number two it really degrades the value of "base building" which is something I assume BI wants to support as a selling point of the game.
For players who want to be base builders, why should they bother spending ages getting the ranks now required and trucking loads of supplies if that base you built up can just be wiped out in an instant.
For now, I would suggest using the captured base "spawn countdown" timer for also locking deleting assets. At least give the defending team some time to recapture the base.
In future it would be great to have demolition charges that could be used by the enemy to destroy base assets without needing to capture. This would be much more "realistic" and more interesting.