Does this mean that ezpg Eris has all the same content as the standalone Light and Shade or we should still download the fanmade patch that adds the content from the standalone to ezpg?
You still need the patch by TheShiningAbsol. This was one of the many reasons why I shot myself in the foot by ever doing the AIO because the records are entirely different, it wasn't a case of just merging the new dialogue from Eris.esp into ezPG.esp.
That adds the new dialogue from standalone but yeah, everything else is up to date. I would've had to go through and put it all in manually otherwise.