Upgrade modem-to-router cable from CAT 5e to CAT 6 or 6a?

[gogreen1]

My opinion only, but that's the wrong place for a router.
(it's in what looks to be a closet, right?)

Seems to me that it should be right out in the open, not next to the wall, in a central room.

I agree. It's the laundry room. Best I could do without running ethernet cable through walls/attic. Vast improvement, though, in connectivity and signal strength from its previous lower, more blocked position.