When I look at the different blocks on the image below, we can see a POS coin, the POB blocks are really in the minority.
For a coin that highlights the POB system, I find it strange.
In addition 10% for pos is really too much for the long term.
10% annual return for the POB with a majority of block and 2% annual return for the POS would be much better in my opinion.

POS blocks have usually much less rewards than POW and POB blocks.
While POW/POB blocks have 10-12 coins per block, POS has about 0.1-0.5 coins per block, variable on the stake of coins (you can have also big rewards, if you stake one block of eg. 50.000 coins).
I agree than POS should have less % annual return, it's a little bit inflationary right now.
But even tho, burning balances it out inflation.