So they like and want to implement vaulting.
about half of the community doesn’t but they do. Since we may have to live with it I have thought of another suggestion to the issue.
Bonus heroes is not bad at all. It’s quite nice getting stuff for free. The issue we have is a 5% chance of covering those old 4* is not that great (despite being better than the old odds anyway).
So change it, make the bonus hero rate for a 4* higher. 40% rate still means most of the time you will get nothing. However I think most people would be ok with all the changes including vaulting if the chance was 40%. You can keep the 5* rate the same just change the 4* rate - significantly. Adding an extra 1 or 2 % does nothing for those trying to build old characters.
That’s my suggestion. It’s free and (I think) it’s awesome. It’s also pretty easy to implement.