Honestly, I don't think it will be that bad. Before anyone lynches me, hear me out.
Spawn tubes were probably the biggest complaint with the whole OMA, Danger Close, Noob Tubes. A person could jump into Ground War and get a map and spawn that favours them, they shoot at a Domination flag and because the enemy team is trying to play the objective, suddenly that person gets 3+ kills, if not wipes most of the team and boom harriers are in, which will almost immediately guarantee you your 11th kill-streak and from there it's either nuke or just a pain in the ass game. MW2 also had it where you can die right after spawning, Chopper Gunner showed this prominently. Recent CoD games have put a timer where explosives will not activate for [x] amount of time when a game first starts or the damage will be significantly reduced. Spawns in recent CoD games also have granted you a slight invincibility against kill streaks, CoD WW2 is the easiest to see this on, especially with the Ball Turret Gunner. I have no doubt in my mind that the timer for full damage explosives and invincibility against kill-streaks after spawning will be in MW2 Remastered.
Onto the Noob Tubes itself. The way people used them were so damn vast. You had people who sat in corners and had it at the perfect distance for it to explode and kill you. You had people who would sit long range sniping with them. You had people who would use them objectively and use it to clear out a room near a point or use it to clear out the enemy from a flag. You also had people who would sit back and try to spawn tube the whole game. I think what most people had seen though were the run and gun tubers, who would use them like actual bullets, hide for a few seconds to restore and then go running and gunning again, until they are on high enough kill streak where they camp back and wait for people to come to them. At that time, especially on console, people were still getting used to an extremely fast paced FPS game that was just bare bones boots on the ground. No jump pads, no speed boosts, no vehicles to drive in (WaW tanks, Halo, ect.) People got caught off guard easily or just had trouble tracing and landing their shots before the tuber got a shot off. Years after MW2, people have gotten used to these absurd gameplay mechanics. Jumping in air, moving/strafing in air, wall riding, super speed, specialist abilities like in BO3, all that type of stuff. I would honestly argue whether you're on console or PC, if you played from MW2 through at least BO3, the skill ceiling that you had to adjust to in terms of aiming during the Future CoDs would help put you on toll with being able to kill a person much quicker on MW2 because it's 'easier' to aim now that you don't have to worry about a person wall riding and jumping 20 feet in the air, while still keeping that strafing momentum. You simply just got to trace a target that is running. Sure, the tubers can have a quicker reaction and still kill you, but I can't tell you how many times on console when I played, I died because a person turned around after I shot and didn't finish off with the bullets I shot, because I missed a few.
I just personally don't think it will be as bad as it was. Over the years people have gotten used to different gameplay styles, different things that were OP. I think there will be a slight problem, but I really don't believe it will be anywhere near as bad as it was on MW2. Hardcore on the other hand, well that's it's own thing. No doubt in my mind that's going to be an explosive cesspool.