I saw a trade where Dean wade was given up for grant and with giving up a frp, I didn't see a need to do that for the Cavs.

Why blazers do it? Frp and save money! They could also flip LeVert at the deadline who should have great numbers there. Niang let go after the two years and give Jerome / Merrill a shot at making an impact on the team

Why Cavs do it? Grant is an upgrade over LeVert and a long term fit for Cavs. The one frp and bench players are expendable when trying to keep up with the magic Knicks and celtics