Compared to what? Is there another piece of software you know of that does it a different, more efficient way?
It takes me about 3 seconds to enter a Simulate Hotkey action. I can then duplicate that 5 times in about 1 second, then go through and change the hotkeys. From there it takes about 2 seconds to group and collapse them. I think this is just a teething problem, and you'll soon be flying along.
On to your macro...
It's best to actually post your macro rather than just screenshots, as it means we can try to help by editing what you already have. That said...
No, for reasons stated earlier in this thread.
X- Keys - Hold Alt.kmmacros (23 KB)
This uses AppleScript, so it takes a fraction of a second for ⌥ to be held down. Just be aware of that. Replace the USB Device Key trigger with your own, remembering to include the ⌥ modifier for the release trigger.
Yes, because that's what your macro does. If you want it to repeat the Tab press with pauses, you need something like this. Remember to change the trigger, obviously.
X- Keys - Tab x 3.kmmacros (21 KB)
The above macros hold ⌥ and simulate Tab separately. I don't know why you want to do this.
Here's one that does both together, which seems the logical thing to do, unless you have a good reason not to. Again, remember to change the trigger.
X- Keys - ⌥Tab x 3.kmmacros (21 KB)