When using user/device licensing, a license is freed up after 90 days of the user not logging in. Is there a way to shorten that up to like 2 weeks? We have temp workers that rotate a bit and since concurrent isn't available for small guys like me, this kinda sucks

No, but you can use this to script it. https://support.citrix.com/s/article/CTX132341-displaying-or-releasing-userdevice-licenses-on-license-server?language=en_US