Yeah sometimes i have the resources to upgrade something but i cant upgrade it because of my th level. sc should add like you can use those resources to upgrade it but the actual upgrade doesn't start until your th levels up. since like everytime i have enough resources but my th is still upgrading and some lucky guy comes across my base and takes it all and i have to save up again...you guys see what i mean?
This is useful for lower level buildings because your storages will be able to contain the cost in order for you to "skip" to a certain level. There is a threshold because of the capacity of your storages. However, I think this is considered "queueing" your builds because you are essentially wanting to build from level 1 - leve 3 (or whatever level) nonstop and I think this idea (queueing idea) is/has already been ruled out (if I am not mistaken).
I understand your point, but I do not think that this would be fair because you are "consuming" your resources before it is actually used. So the resources are placed in a "temporary" location that cannot be stolen from an attacker and the resources is not technically used until your TH level is finished (as you stated).