I'm not sure I fully understand this halving.
The first halving was planned in ~3 years.

So we would do this halving in July. OK. but why continue the next halving at a rate of 6 months afterwards?
Is there not a risk that the currency in circulation will never (or in a very long time) exceed 10% of the total suply initially planned?

Why not reduce the mining reward only? 30 for PoW and 60 for PoS?