SX1276 RF layout

[uer166]

This is my first real RF project and wanted to double check a few things:

• Does RF layout overall look reasonable?
• The dev board has a zillion vias to tie the 2 GND planes together in places other than around the coplanar waveguide traces. Is this necessary, or placing a via say every lambda/10 sufficient?
• Is there a reason why the dev board designers preferred coplanar waveguide vs. microstrip? I would generally prefer microstrip, but I copied the reference design as much as I could with the copl. waveguide
• While it's obvious that the impedance of the traces matched to 50-ohms should be 50 Ohms, what about the trace connecting from the SX1276 RF ports to the matching networks? The port impedances aren't 50 Ohms (otherwise there would be no matching network). Is it short enough to not matter?