I have a couple recommendations & a question for the Master Unit List site and whom ever is in charge of it...
#1...Easy addition...Can you have your programmers allow the download of a .CSV or .XLSX file of the displayed units. For example, I go to the site and click units, apply filters for Inner Sphere & Mixed Tech, and then select a Faction and hit apply filters. This brings back a list of all units for that faction in those given techs. Either at the bottom or top of the list, there could be a download button that allows a file of those said units to be downloaded and viewed offline (yeah I know almost everyone is always online)...but it could be helpful and should be a really easy addition to the site.
#2...BIG addition...At some point, if/when things slow down for you guys, could you add in the description of each unit, what planets and/or factories the mechs (vehicles, aerospace, etc.) are manufactured on/at? It might be easier to have the factory show for the mech, especially when it comes to variants, and that factory link would take you to the factory description, which would then show you what planet it was on...and what house/clan had possession of the planet at any given time. Currently, without this, we as Battletech players have to dig through Sarna.net to find these types of answers, and we all know it's not 100% reliable, and it's only updated to around 3067. At least with the described option on the MUL...we would have official cannon answers.
#3...Question...The listings for Wolf's Dragoons in the Eras of Late Republic and Dark Age seem too light. I realize they are coming back after being nuked on Outreach...but being that they were on Arch Royal, would they not have access to the Clan Wolf in Exile mechs, Arch Royal Mech Works mechs, and the Lyran Commonwealth mechs that were manufactured during that time?