Hey Adam,

Regarding your site slow issue actually that is not related with those revision data.

And currently we do not have any better solution for this, because now the blog post is rely on the post revision.

I have a question, may i know your existing blogger is it will edit their very old blog post from your site?

If no, you can follow my instruction to reduce a little size from your revision table from database.

Note : before you run this following SQL queries you have to backup all of your existing data first.

Replace #__ to your database table prefix

update `#__easyblog_post` set `revision_id` = 0;

truncate table `#__easyblog_revisions`;

After you done that, try open your Easyblog frontpage, it will regenerate again the post revision in your table.