Adding C4 at Black Market will be useful but removing the checkpoint at El Corona is a bad idea.
Having the ability to carry more than one Pipe bomb wont be added since it is a VIP package advantage, so just purchase the VIP package and you'll have the ability to spawn two Pipe bombs (Spawning one from the package then spawning the other after the usage of the first).
Carrying 1 pipe bomb at a time makes it so one player cannot rob every location one after another. This was implemented because there are very few locations that use the pipe bomb.
The C4 checkpoint will stay for now.
Being able to purchase C4 from the Blackmarket isnt really needed, but it may be added at some point in the future.