I suppose if you wanted the dot to be less of a bump you could knit all the white sts but I think part of the pattern is that the dot stands out from the background without being a bobble.
If you're knitting tightly, that's going to make the p2tog and especially the p3tog, difficult. Try to loosen up a bit even if only on these sts in the previous row.
I think you did a great job on the mitts. They look perfect! Well done.