Right-click on Structure to destroy
The same method currently works for changing up fights and bombers.
The UI is congruent because right clicking is only for removing items being queued. It works for fighters/bombers because they are in a constant state of being 'queued' in that they auto-replace themselves whereas buildings don't. Note that you can right click to destroy them before they are actually built. To destroy them without zooming in, you can select them on the empire tree and click the scuttle button. This also keeps them consistant with how all other 'built' items are destroyed (frigates, capitalships etc).
Edit: We purposely kept the scuttle button away from all the others and difficult to hit so you wouldn't mistakenly destroy something.
That will be handy when beta 3 comes out.

This technique doesn't allow you to pick specific things for specific actions (e.g, selecting a structure to scuttle).
Hold down ALT, it gives you the names (as well as lots of other info).
It sounds like you aren't aware of all its functionality or you would prefer to use the Selection Based Empire Tree, which has much different behavior and is likely more suited to your play style. Check it out by activating it in UI options.
This technique doesn't allow you to pick specific things for specific actions (e.g, selecting a structure to scuttle).
I'm saying add a scuttle button elsewhere, and you're saying it's already there. I said elsewhere damnit! 
Hold down ALT, it gives you the names (as well as lots of other info).

It sounds like you aren't aware of all its functionality or you would prefer to use the Selection Based Empire Tree, which has much different behavior and is likely more suited to your play style. Check it out by activating it in UI options.

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