I think people have forgotten that the underlying premise on the first impeachment was the idea that Trump would ask a foreign leader to look into the illegal practices of a potential opponent in a Presidential race.
This looks more than anything, like a fishing expedition - excluding the lawyers, initially refusing to show the warrant, and as far as we know, looking for classified documents which appear to have been declassified. We don't yet know what they contain, but I do know that something as inconsequential as a handwritten note from a foreign leader can qualify. My gut tells me it is extremely unlikely they could possibly hold anything of consequence after a year and a half.
The ham-handed way this was conducted suggests more strongly to me as - panic. As in, we need to get this stuff that incriminates US before the November elections leaves our collective asses out to dry.