The Evolv, 7V, Satisfaction and Dawn (just to name a few) have started to really popularize the vertical function row. Throwing in some novelties that hit r1, r2, r3 and r4 make that function row look really nice! Just something to consider.
For the novelties kit, I can't seem to make an all-novelties non-standard bottom row work.
Take Evolv for example -
https://geekhack.org/index.php?topic=104531.0 (or any other keyboard with its layout):
1.50u Left Ctrl = Hat
1.00u Left Windows = Flame
1.50u Left Alt = Hat again? (same symbol used for Left Control)
1.25u Right Alt = Eyepatch (doesn't match Left Alt)
1.25u Right Fn = Cast
Basically, I would like to have two additional 1.50u R1 novelty keycaps of a different symbol to prevent overlapping the same symbol onto different keys. Probably eyepatch since it only comes in 1.25u size for R1.
Someone, please correct me if I'm looking at this wrong. I should have gone to sleep a while ago.
P.S. I also agree with pearlyeti about adding 1.00u R2 & R3 novelties to cover a full vertical function row.