On the Dekker-Parsons comparison...Parsons is interesting in that his statistical profile at Florida should have easily made him a first round pick. He didn't stand out because he was underutilized in college, and it took a stats-heavy franchise like Houston to recognize his value. Still interesting case in which a 4 year college player has seen his usage and scoring climb significantly in the NBA.
Statistically, Parsons was better than Dekker is. I think it is fair to say he was a more skilled player than Dekker -- shooter, passer, ballhandler.
Again, I wouldn't trade up for Dekker or anyone else. I mean, maybe if it only took some money to do so, but still I think the allotted $3.4M or whatever each team is allowed to use in trades per year would be better used elsewhere. Draft is just too much of a crapshoot to be chasing players. I'd sort of prefer another team falling in love with a guy available at the Cavs' draft slot that would be willing to give something up to move up. You don't see this happen often though.
As of today, for what it's worth, of the players projected by DX to be available when the Cavs pick (currently #24, though they could easily move back a slot or two), my preferences would be Rondae Hollis Jefferson, Delon Wright, and Justin Anderson. That's irrespective of position.