I have ESO+ purely for the decreased research times, at the moment. From launch, it was to get access to DLCs as they dropped, increased XP (as I was, obviously, still leveling). If you think most of your gaming time will be spent in ESO, I'd say it's worth it.
With that said, once I'm done leveling the last two classes (NB and Sorc) and all my research is completed, I'll be dropping ESO+.
Scrolls are super worth the crowns. But if you wanna horde your crowns like me (I have a problem) you can always buy some perfect ROE from a guild trader and have some of our members who have the psjiic ambrosia recipe make you some experience potions that will do the same thing as a scroll, just doesn't last as long!