Welcome to Smogon! Take a moment to read the Introduction to Smogon for a run-down on everything Smogon, and make sure you take some time to read the global rules.
I 100% support this decision, after some stall testing Eldegoss is invaluable for stall teams due to its incredible role compression, Key Resist in Grass (Water and Ground are also nice), pairing incredibly well with tier staple Gigalith in order to check many of PU's threats. It being a spinner...