Hi Don,

If you've only been trying to establish your lawn for two years, I'd say
you're doing GREAT! Most lawn will take a few growing seasons before
they start to look really good... I don't know what the site looks
like (with the tree gone) or even where you live (zone)....

It sounds to me that you really know what you're doing, and you know
all about the "have-the-soil-tested mumbo-jumbo" (so, I wont get into
that).

I'd say 'keep up the good work' for now, because of the season
(Spring-time USA). Maybe this summer things will change for the
better... and then there's the FALL (best time for planting new grass
seed).

HOWEVER, the one thing I've leaned over the years is... sometime,
it's best for Mother Nature to take her course. Maybe after next year,
IF the site STILL doesn't look as if you'd like it to... possibly add in
a dry stone bed (creek)... or some water-loving plants.?

Best of luck,
Dave