With how awful the vehicle sandbox is I feel like it’ll genuinely impact the campaign experience in a significant way. The scorpion is near impossible to drive, the banshee is useless, the chopper can no longer destroy vehicles with its charge, etc. 343i said that they don’t plan on addressing vehicles until post-launch, which is very disappointing.
Honestly I think its too early to tell how the vehicle sandbox will be impacted in the campaign (except for handling like driving)
Each game has different values not just for vehicles but for each NPC which changes with difficulty, so while some might explode after a few hits in MP, the campaign itself could have them near unkillable, or have them do more damage
Best bet is if you’re unsure just wait until it launches and you see some gameplay 
Isn’t 343i after stating the campaign sandbox won’t be changed only mo 8s patched
Gonna be disappointed if there isnt any banished version of warthogs in campaign
Yes. I’ll probably just play the campaign, multiplayer is not interesting me as it stands. Maybe I’ll consider it in the future if changes are made.