Lowry missed 20+ games last season and Toronto still posted the best point differential in the East and came within two wins of first place.
I think we're seeing a little bit of an inflation of the Celtics based on them over-achieving last season. Their point differential was actually better two seasons ago, when they won 48 games and finished fifth in the East. My hunch is that Hayward will help offset some of the regression that was likely to come, which people will misinterpret as him either disrupting the chemistry or being overrated.
Horford has already regressed from his Atlanta heyday and is under contract at close to 30 million for the next three years. In sum, he's a solid center who places a hard ceiling on your team at that price - he's an earth-bound tweener who offers little vertical spacing and doesn't draw fouls, he's not quite good enough as a shooter to terrify defenses, and he lacks a component of athleticism that has been pronounced in the postseason for virtually a decade now.
Skilled, heady player who's more than useful to a team. They overpaid him, and now, as they scramble to clear cap space for Hayward, perhaps at the expense of a useful rotation payer or two, they find themselves in a bit of a quandary. Play for now, or play for later? I think the consensus is to play for later, but I'm not sure straddling the two extremes - which is what they are doing now - is quite as viable as people believe. If you're waiting on a bigger fish to hit the trade market, does Horford's contract become a roadblock? Does Isiah's contract - if they extend him - become a problem? Hell, Hayward's could be an issue. We don't know. If I'm Danny and I have all these assets, I want as much roster flexibility as possible. That means cheap, young players, no long-term contracts, and an eye towards a discernible end game rather than feeling out the breeze. Your take is a very good one and I'm with you especially on not waiting for the shine to wear off Tatum and Brown, because that's a matter of when not if. There are very few Kawhi's, and even he took until year five to make an all-star game.