I agree, too. Editing levels takes more time or work than it seems like it should.
Being able to click/drag to add or change tiles in positions like that would speed things up greatly, I think. I mean, I would prefer it.
A plugin or feature for this should check for square or rectangular regions of the same tiled object, and combine them into one where possible. It'd also be nice if it could stretch certain sprites (such as the ones some use for collision). Oh, and the plugin/feature ought to have an optional setting where you can choose to add these collision blocks with the blocks you draw. Maybe. Though that could be done manually, too. Also, one would still want to be able to cut out holes in the collision afterward for hidden tunnels and things.