arent alot of the same people who complained that Grant isn't worth it to keep now complaining that we didn't match him? 
Honestly, Losing Grant isn't bad in a bubble. the return is disappointing. Its the lack of other moves for the bench that make it more glaring.
We're not the only team that is losing players for inadequate returns. The new CBA is making it a lot harder for front offices to maintain deep benches, especially when you have like $100m tied up in three players and then $25m on the fourth (even before the extensions and supermaxes coming down the pike). Apparently we're $7m below the second apron as it is, even before Jaylen's supermax and KP's extension next season, so if we use the MLE it would hardcap us at the second apron for the season. The penalties are a lot more debilitating than just having to pay tax. They obviously don't start till next season but that's probably where the reluctance to carry long term salary - like if we had asked for incoming salary to match GWill's new contract - is coming from. So we can't even blame Wyc for being a cheapskate like we have been for the last few years 
- Teams cannot use a trade exception generated by aggregating the salaries of multiple players
- Teams cannot include cash in a trade
- Teams cannot use a trade exception generated in a prior year
- First-round picks seven years out are frozen (unable to be traded)
- A team's first-round pick is moved to the end of the first round if they remain in the second apron for three out of five seasons
Brad probably doesn't want to get hardcapped for the sake of filling out his deep bench. Sucks for us as fans, because the team will always have a weakness in the roster, but I think that's by design with the new CBA - no more Warriors superteams that linger because of an owner that is willing to pay $170m in tax a year.
But maybe Brad's not finished. He does have that MLE if he wants to get hardcapped, and the TPE if he doesn't. But I suspect neither will be used until midway through the season, when the needs are more obvious, if they get used at all. I know - BORING 
It's the bolded part that makes it disappointing.
We keep hearing that cheap contracts are going to be more and more important, which is great. You get those cheap contracts through draft picks and minimum contracts.
To date, Brad hasn't used a first rounder, and hasn't "hit" on a second rounder. So, it's hard to have a lot of faith there. And, in free agency, he's been lousy at finding competent players at the minimum to date. He's very good at trading, but as you note, trading is going to harder going forward; there are some restrictions on trades -- such as having to be within 110% of contract value -- for teams even over the first apron.
If the Celtics had signed Richardson and Craig, I don't think you'd hear many complaints about moving on from Grant. But, the worry is that we've essentially lost four rotation / quasi-rotation pieces, and have replaced them with KP.