1) When you get RMS licensing which is the new conversion for traversal licensing, it gets applied on C and E for one call. Reason Cisco doesn't allow converting traversal licensing for VCS-C is because back in the day VCS-C was licensed based on non traversal licensing and traversal licensing was included in the bundle at no cost and it was quite a high number like 100 or something. So converting all that RMS which is a paid license won't make any sense so only stuff customer paid for which is the traversal on E should be converted is the logic
2) DX80 is good and would take ENH
3) So on VCS-C today you can convert current room systems to TP room, Movi to ENH/ENHP
Jabber Video for TelePresence/Movi client licenses (in TMS with LIC-TMS-PE-xx or LIC-MOVI-xx) are a concurrent use license based model. Some customers may oversubscribe the number of licenses. UCL and CUWL licenses are user based. For this reason up to 3 UCL Enhanced or Enhanced Plus licenses may be ordered for every Movi client license in TMS. Note that SWSS is added for every UCL license ordered.