I'm afraid that if you add 50m coins to the total supply, the numbers will only get diluted.
Total supply 84m+50m=134m so 50,000,000/134,000,000*100=37.3134%
I have no idea how to fix it, but adding coins to the total supply doesn't looks like good idea

Unfortunately no that's not how it works, please do the maths to calculate the max supply from halving and you will see. And even there 37% is very high especially when they don't mention it.
Anyway, it's a personal choice, nobody's forced to join the project, only shared my thoughts
