lyles isnt even very good, but he's more of the "theoretical" stretch player they need at that position. lyles shoots 36-40% from 3. bagley never shoots 3s and clogs the lane without doing anything you need from a player like that (rolling to the basket on pnrs, playing defense, blocking shots).
another "big man" weaver acquired based on draft pedigree and the fact that he's tall rather than actual ability or fit with his franchise cornerstone.