The Horford contract isn't great, I agree. But at least he's a starter, who have decent production. Years 3 and 4 of that contract will really suck, but it shouldn't prevent us from one big signing this free agency period.
We definitely over paid for Horford, but considering no top free agents ever picked Boston in the history of Celtics basketball, we had to give a top 30-40 more money then they deserve to lure them here.
Now we got a fairly attractive core, in a weak East conference, which should help attract another high caliber player.
Lol at mentioning Westbrook and Boogie. Neither are signing in Boston. Paul George, without a sign and trade isn't either. It'll come down to Hayward/Blake. In 2019, with all our young players and assets, if we really wanted to dump Horford, we will surely find a taker, similar to Brooklyn taking on Mozgov to get Russell.