Upgradeable Spring Trap?

You should be able to upgrade the spring trap so it can fling more troops with each level. For example, level 1 would fling 5 troops worth of housing space, level 2 would fling 10, level 3 would fling 15, and level 4 could toss 20 troops out of your village! Right now, the spring trap flings 15 troops, making it OP at lower Town Hall levels and ineffective at higher levels. Being able to upgrade it would make it dynamic at every level. Also, it is the only thing in Clash of Clans that can't be upgraded, besides builder huts.

Please comment with your ideas for spring trap upgrades, and thanks for reading!

To be honest I never had a problem with the spring trap and always considered it simple and effective, and I tend to want to keep it like that, so I will disagree with your suggestion.
You say it can take 15 troops which is OP, well.. the same could happen to a giant bomb or 2 small bombs placed together. The traps are most efficient against packed troops so just spread your troops a little and the spring trap won't bother you any more.

If you play close attention to any attack replay, you'll notice that there are several occasions where troops pass by just nearly at the border of the spring trap but don't get thrown away by it, while disarming it altogether. The trap works and is magical as it is, bud.

you guys do make excellent points, but I still think upgrading spring trap would be awesome.