I already owned MV, ACE etc - but I chose to pay $50 to show support and with high expectations of the "RPG Maker MV Starter Pack" DLC due to the number of included packs.
I couldn't find any valuable information to base my decision on, and made the decision to do a blind purchase, which is the reason why I'm posting this here

. If you are thinking to pay extra just for the MV DLC,
I recommend do not do it.
If you buy the DLC expecting an actual starter pack to enhance the defaults - you will likely be let down. The packs are barebones (for example, the 4 seasons town pack, which you may expect from the video and description to have 4 seasons worth of tilesets, is really underwhelming and more like 'here is a sample of what 4 or 5 winter tiles looks like'). I found only a few of packs actually fit the default MV style with sporadic mismatched graphics (first faux realistic, then the next pack is parallax, then traditional pixel RPG art, then the next is a bunch of photo-realistic animal sprites).
TL;DR - although the bundle is worth it to show support, I recommend avoid it if the only intent is for the MV DLC.