Hi Timothy,
there aren't technical limits for numbers of EVGETS, obviously with complicate Workbooks there are
performance issues.
You can try to split the workbook in several workbooks and see if possible to substitue all the EVGETS with few EVDRE to have better performances. In EVDRE you have also the "workbook option" "refresh by sheet" that will update the worksheet only if you click on the tab of the page, this will also reduce the time to laod the template and to refresh it.
Regards
Roberto