Jetpacking breaks map movement? It also "introduces new map movement." Really, all armor abilities "break" some aspect of the game. That's the fun part about them. The trick? Play the playlists that don't have armor abilities. There are three of them. Or bump around in Customs. Tons of gaffers here hate armor abilities, too! I personally enjoy the game "breaking" sandbox.
I'd respect your feelings about jetpack or even camo if you didn't hate on PV. PV is such an overrated ability. I've never felt like I died to someone because of PV. It has a huge cooldown. If you think it's giving you a distinct disadvantage, you're welcome to wait for the ping to go away, or even use it yourself. I use PV on Dominion because people camp bases. I'm glad it's there.
And yeah, it sucks that there isn't a better playlist catering to solo players. I've always felt that Halo by yourself was poor, though, again. I play it for the teamplay. For the social aspect.
Weapon spawns aren't totally random. If the Rockets spawn, they spawn in the same place. If the Sniper Rifle spawns, it spawns in the same (or one of two) places. Go check out Forge. Camp Binary Rifle spawn or Incendiary Cannon spawn, with an eye to the other locations. Run with the Rogue (?) spec that lets you anticipate what's coming. It's not a complete gamble, and I like that it's not a certainty, either.
And again, how many melees should it take to kill someone?