It's an opinion piece, there's no "facts" here to make them non-generic responses. Neither by Lowe or anybody else. Only time will tell if he was right or not. Those areas I pointed out are areas everybody is well aware of that we've been lacking.
For example, we as Spursfans know that TP and Manu are treated like family by the Spurs org, and they'll likely stay for as long as they want. But an outside observer doesn't have to adhere to that. On a league with Curry, Westbrook, CP3, Irving, etc it's hard to argue that the Spurs are at a disadvantage at the starting PG position. The fact that they apparently aren't even looking to upgrade that position (due to what I pointed out earlier) should be tacked in the "loss" column. We have no fallback also if Danny Green has another ty shooting season. Losing Diaw on a contract year, on the other hand, is very factual. Will it be the right decision or not? Only time will tell. Boris is a guy that went from terrible to amazing to terrible in the span of three-four seasons.
That doesn't mean the Pau pickup wasn't great and hopefully offset quite a bit losing TD. But he's looking at the overall, and there's no doubt that there's some areas that were concerning from last season (and perhaps even previously to that) that weren't addressed. Due to money reasons or whatever other reason.