Covington a "journeyman"? Not sure where you get that unless you're going with the British take on a "journeyman" being an athlete who's played for a lot of clubs. The American sports definition of a guy who is competent, but not able to excel is certainly not applicable. Covington has been a starter every year but his first season and he's been seen as a borderline star, primarily due to his defensive prowess.
The Blazers' claim to being contenders this season rests on the addition of Covington and DJJ, who should dramatically boost the Blazers' woeful defense of last season, and also the return to health of Nurkic, Collins, and Hood, all of whom are impact players. The Blazers are now DEEP and they will be much better defensively. Does that equate to being a contender for the title? I think that remains to be seen, but we haven't yet experienced a mature Damian Lillard backed by a stacked team. I wouldn't bet against him.