Hiked Marcy last weekend (5/15) along Slant Rock Trail from the Garden. First snow on trail was around the ~3700ft level. Up to treeline there are maybe a half dozen patches of trail crossing snow of 20ft in length. I suspect those may be gone after this week. The snow was no big deal (snowshoes and crampons not necessary). The only thing that will slow hikers down is the amount of water rushing down Slant Rock Trail on points above Slant Rock. The water makes the rocks a bit slippery, especially on the descent.
It is a bit muddy. So bring the gaitors and extra socks wouldn't hurt! Just ask my girlfriend who stepped into mud about 1/5 ft deep. She wasn't a happy camper at that point.