Does anyone know why the the feed rate slows down significantly at some points during a v-bit carve? Thank you! It started doing that about a month ago when Easel upgraded.
Many things can cause such behaviour - please elaborate, share a project that behave like you describe and we may be able to assist 
Nodes on curves in the vector drawing probably.
Z-moves are usually slower than X-Y ones. If you’re doing true V-carving, maybe the Z feedrate is slowing down the overall speed?
Z acceleration value impact the result also, not only is Z slower it also have slower acceleration rate.
Nodes as suggested is also a typical candidate. With an overview of the project we’d know more for sure.