I for one would say no.
First the vehicles, I don't actually own many yet but from what I'm seeing there is to much focus on co-op. Like the APC you need a driver and a gunner, I see no reason to get one as I play solo half the time (really wanted it to operate the same as the Rhino). Same with the new buggy, needs a driver and a gunner, again useless. I have a MOC but only because you need one to customize guns and cars. The only car that I think can be solo driven and operated is the new Tampa. While I love the look of it, I wanted more then 1 new vehicle to look forward to.
The missions I haven't played yet so I won't judge them.
The business is a reskin of bikers, kinda lazy honestly.
Helicopters are still useless as Rockstar did nothing to add defense to them. I also kinda hoped Rockstar would realize that it's not 2013 anymore and that GTAO is completely different, thus would restore the Rhino's armor for those of use trying to solo survive the game. But alas it didn't happen.
Then they fixed most ways of getting a solo public session, while I get why, that pretty much drove me off the game since the update came out. Only started coming back around the past few days.
On the plus side the gun mods seem cool, explosive sniper rounds are insane. But ultimately I feel this update is designed for crews. If your going at it solo, your pretty much shafted which is a shame.
Also as I mentioned in a previous topic, no new VIP jobs was disappointing as well.
Did Gunrunning deliver on the hype for you? I personally think it left much to be desired.