Forecasts that are more than 7-10 days out are generally not too reliable--especially since we haven't shifted into the summer/dry pattern yet. There will be a lot of snow up high, but Yosemite Valley itself should be free of significant snow up to about the valley rim, depending on sun exposure. The temperature could be anywhere from chilly to quite warm: a month ago we had three trips that were all quite temperate, but the past few weekends were chilly.
As for Glacier Point: the road may be open, but don't be disappointed if it is still closed and the trails are still under several feet of snow.
As for Half Dome: I really doubt the cables will be up in 2 weeks, so I think you'll need to pass on that one.
There's still plenty to do in the valley. The Vernal/Nevada Falls trails (Mist/JMT) and Yosemite Falls trail should be on the top of your list, but do expect some packed snow and ice on these trails. The Four Mile Trail to Union Point (about 3/5ths of the way up) is also nice, as is the Snow Creek trail as far up as you feel like. There's also nothing wrong with the valley trails, including some or all of the Valley Loop trail, especially the Mirror Lake/Tenaya Canyon loop. If you want a bit of a break from the inevitable crowds the western valley loop trail (Yosemite Lodge/Camp 4 to the Pohono Bridge and back via Bridalveil Fall) is a nice walk.
Mariposa Grove is closed, and the 120 closure makes the Merced and Tuolumne Groves not worth the drive, but... there are 25 sequoias in the valley you can "
boop"--if you can find them. And no, I'm not telling--these trees aren't not generally outstanding, but wandering around anywhere and everywhere in Yosemite Valley when the waterfalls are all going strong
is outstanding--and highly recommended.
Have a great trip and be sure to let us all know how it went--with lots of pictures!
Okay, one hint: Boop!