You know what? I think that with the Glimpse option is interesting, but at this point I'm just not feeling it. With the current mechanics, the WtG trait is going to invite a rather boring playstyle in terms of DS spell purchases. Basically, we will try to save up to 25 for Elemental Planar Portal II, and when we buy that we will have everything currently visible under the DS tree. From that point on, if we want to meaningfully improve at all, we are going to have to save for something costing ~50 points in DS, and that will take literally months. I'd like to think that part of the gap would be made up by us doing research to discover new spells (I dunno - "spirit portal", maybe?), but from the way
@Wander described it there isn't
all that much to discover out there.
In the meantime, the costs for everything
else also go up, which means that raising them suddenly becomes less fun too. This is particularly vexing since high-level DS spellcasting could seriously use investment in other categories. General Magic is necessary if we want to reduce the cast time of anything advanced to a combat-applicable duration. Things in the Elemental tree let us better use our Elemental Portals, and stuff in the Spirit tree let us use Spirit portals. So - WtG will give us breadth in our DS casting, but will make it hard to acquire the support abilities that would let us properly leverage our DS spells.
[X] A flash of brilliance- gain +100 points in dimensional science