Your solution, disabling manual reclaim for small props (trees and small rocks), but allowing them to be reclaimed by attack move, is possibly the most inelegant and unintuitive solution I can even think of. It reads as if I just described the issues with reclaim to my 8 year old cousin, who has absolutely no understanding of the game, and had him try to create a solution to the problem.
It belies a complete lack of understanding of the fundamental tenets of game design. Are we going to have to create a must-read forum post now describing what is manually reclaimable and what is not? That seems necessary to make it clear what is manually reclaimable and what isn't. Your solution makes it difficult for a new player to even learn what is reclaimable, and even for the experienced player your solution adds unneeded complication. It will be extremely frustrating to manually click reclaim only for some of the commands to not go through. This adds a whole new set of complications – with your solution, players likely now have to learn what reclaim is manually reclaimable on a map-by-map basis.
I took the time to respond to your post and point out the issues with it, not because I think your opinion deserves it, but because the community needs to realize just how useless the drivel you spew is. I agree with Tagada that there should be some kind moderation for misleading or harmful posts.