Hey IGeaRI, thanks for sharing! UX lead on TFT here. I'm stoked that you and other players want this in the game as much as I do! This has been in our UX sights for some time now. Funny timing - I started a couple of designs for this exact thing earlier this year, with the intention of including it with Magic 'n Mayhem, but I quickly realized that the project would need support from a dedicated motion graphic artist or animator. (Using a shortcut to level up should show a punchy celebration, yes?) Unfortunately those folks already had a full plate. Not to worry though, since we still need to work on versions that will be intuitive on mobile anyway.
I can't promise when this will make it into the game - things are always moving fast on TFT - but I just wanted to thank you for your post, assure you that I love the idea too and want to see it happen!