Kinda glad they were removed. I find cone area of effects to be a major drawback to any spell. It's one of those things that seems cool, but almost always works best for the DM, not the PCs.
For a trap or a solo creature like a dragon, the cone works out well. It has no potential allies to hit and can get most of the party. It's also easy for a DM to design an encounter where cones can be blasted about freely due to elemental immunities and the like.
But given the option between a cone effect (cone of cold) and a line effect (l-bolt) for a PC, the line effect is the better choice (and makes l-bolt generally a significantly better spell, even with the lower cap damage). With cones being a set shape, without being an archmage, it's almost impossible to hit a significant number of opponents without hitting your allies. It is much easier and preferable, IMO, to hit 2 out of 4 enemies with a line effect then 4 out of 4 and 2 allies with a cone.
As a DM, I might miss them being gone, but as a PC, they were never really all that worth it, and I would go out of my way to not have cone effects.