Donate now feature and Clan war heroes problem

Hey Supercell!
I think that instant donating is far too expensive. I know you are calculating elixir cost + time to make that troop, but for higher level players, nobody would pay 5 gems for only one Hog if he can spend 1 gem and 130 dark elixir for 2 hogs. The reason for very low war activity and a lot of people retiring from coc is becouse they cant use heroes while they are being upgraded. If you add feature so you can use heroes in war while they are being upgraded, that would bring at least 20% of people more active in war. And one more thing i didnt mention in title is about Friendly challanges. I think its just stupid that if you change like 2 buildings in your village that you need to wait 24 hours so you can test it.

If you don't want to use the donate now feature because it's too expensive, don't use it. Just cook the hogs in your dark barracks, let them finish, and when the dark barracks has the !!! of the building, go in and donate.
Where are you getting that 20% number from? Did you pull it out of your ♥♥♥? Not using heroes is a bane on those of us who depend on them for war, but we are patient. my clan typically has people sit out during every war because their heroes are upgrading.
The cooldown is there for a reason on the friendly challenge.

I agree with you.. instant donation should cost only time! About heroes, I've seen a lot of conversations going on.. I think people would enjoy more your opinion, however SC would propably lose money... About friendly challenges, i think this is happening because of war bases.. So you can't copy an opponents base and practice on that base before going to attack.. I found the solution to that by having only 3 bases and copy of them at war layouts, so when i move something by mistake, i can still make challenges..