Open Philanthropy, Survival and Flourishing Fund, EA Funds and several other "EA-aligned" grantmakers publish most/all of their grants. But they're kind of hard to search, and it would take a lot of work to assemble a complete picture of all the publicly-available grantmaking that EA Forum users might care about the most. Has anyone done anything like this? I think it would be pretty interesting (and maybe useful!) to have a spreadsheet which automatically pulled in all grants from the top funders we care about.
I recently commissioned one for EA Funds, it would be fairly easy to add OP and SFF into it.
(Assuming you mean "rot")
As far as specific needs, nothing very specific. Sometimes I wonder how much overlap there is in grantees between the different grantmakers, and having more of them in one table where they can be collectively sorted and filtered would be more useful. I just generally think it's good to have transparency in grantmaking, and a single source that covers >90% of what people might consider "EA grantmaking" is more transparent than asking people to look at several different HTML tables or non-tabular lists.