There are a couple of things that make things difficult which I believe could be sorted out via modifiers.
Recently I have been remaking an old Far Cry map called Hollow Town from the Instincts games.

There are lots of generic shapes, houses, items which we can climb up when we get a button prompt and this can sometimes give players access to areas we don't want them to be in so makes much more work for the map builder then building in things so they can't access certain areas or changing the items to something not climbable which is all time consuming to the builder.

Also in some maps Takedowns can be a pain where the design and theme for the map could actually better without them if players could use say fists only.

Two Modifiers could eliminate the above problems.

1. Turn Off Takedowns so when this is selected takedowns are not available in the said map.

2. Turn Off Climbing so players no longer get a prompt and can't auto climb which means the only way to then climb would be using the grapple hook - unsure if Ledges would still be function-able or if these would also be unavailable.

PVP Only Power-Ups
I am also a huge fan of Power-Ups and playing that latest Lost On Mars DLC I really liked the shield and invincibility cloak but at the same time would also like to see the Homeopathics in the form of a power-up that can be walked into / absorbed.

So this would work where you walk into say an Orb and on walking into it the orb would vanish and the player then gets it's properties / powers for a set length of time.
The power-up could respawn and we could alter the respawn timer as we can with weapons when they are placed in the map.

Lots of people do not understand homeopathics unfortunately, some don't even know how to access them so for those Arcade style maps power-ups would add a whole load of fun especially The Fast and The Fury - one where we could jump higher would also be fun.

Is something like this doable for Multiplayer and is adding extra modifiers like those mentioned above an easy task ?
Would love to get a response or feedback such as a straight Yes it can be done or No it can't or if enough want it we will look at adding this.

Would also love to have the Grappling Hook and Wingsuit as Collectibles that appear like weapons and they respawn so only players that pick them up can use them, this would then give a player that explores a map a way to possible attack from an area others can't access (so a perk I guess) for finding the wingsuit or grapple enablers.

At the same time if the refresh rate was say 30 seconds a player could get there and find he / she has to wait for it to appear or take a different route so it could make things interesting in maps but unsure if they could enable a way where we have these things turned off in modifiers or loadouts but they auto enable for the time you are alive in the map ?