Here's my sperg out I'll make about Demolition Man.
Is it tricky for a new time player? Sure. Introducing a completely new gameplay element into a game, let alone a series, will always be. That's not inherently a bad thing.
Good things about the mission are that there's no real consequence to failing the mission. You won't lose your weapons or money because you're not going to be wasted/busted, so you can do this mission as many times as you like and get used to helicopter controls early on.
The mission start point is so close to the actual RC van that it takes less than a minute to retry it. The timer doesn't start until you drop the first bomb. The actual RC Helicopter is fairly durable, and you can kill the enemies by basically touching them due to your small size and the blades.
The dropping of the bombs is very generous in regards to where the bomb lands in conjunction to being placed on the barrels when you drop it.
These are all elements of good design. They could have made it so you have to travel halfway across the map to trigger the mission or something. They could have had the timer start immediately. Could have made it so you had to hit the barrels in a very specific, unintuitive or difficult order. Make it so that the construction workers can't be killed or that their hammers do ridiculous damage to your helicopter. The bombs may have needed a precision drop directly onto the barrel. Etc. Etc.
There are a lot of fucking ways to have shitty design in this mission, so the fact it's "hard" or "tricky" isn't one of them unless you require absolutely no fucking challenge in your game and just want to watch a movie, which is basically what GTA V is with it's "you died three times, want to skip this entire section of this linear fucking set piece?" design.