Game Gadgets and Armor Abilities

Just curious to hear everyone’s thoughts on the gadgets.

I’ve found that a few are lacklustre and I honestly would love to have some return from Halo 3.

The deployable cover seems to be so weak that it often just delays the inevitable damage you’ll receive soon after it’s deployed. I often find it cant deploy fast enough to be effective in firefights.
Id love to see a return to the way the deployable cover worked in Halo 3. Or perhaps bring back the bubble shield from reach.
Am I using it wrong? Thoughts?

On the same point would anyone else like to see the vehicle mines from halo 3? or perhaps the gravity lift? or maybe the regeneration fields?

Id love to see these expanded upon and buffed. Am I alone?