I wore a similar piece for a few months before I got my Lazyroller hoodie. Did you ever end up crashing in it? I can’t imagine it would be very protective but I had a China knockoff so IDK.
No I haven’t had any spills in it YET… lol but experiencing a few fall in different manners I feel confident with it on… and I selected to go this route rather than the hoodie gear is bc of the shell padding… when/if I fall again I want to slide & not get “hooked” on the ground…so I’m mindful of that when selecting my padding…
And I use one of these on the hand that I hold the remote with lol…doesn’t offer that same protection as the MBs but it’s something and it has some metal buttons (shell like) on it…again what i want in case of a fall so my hands slide out… https://www.amazon.com/gp/aw/d/B0751BJKWW?psc=1&ref=yo_pop_mb_yo_pop_mb_pd_t2
And for Ruroc Helmets, the mouth piece isn’t certified and I heard it can get of when you slide over the ground wich would make it useless - and for that price…
yes you can take the slide pucks off every skate glove, as they wear down and need replaced. I listed my favorite (the lightning) for street, Because unlike all the others that are full leather or kevlar finger tips, the finger tips on Lightning are Neoprene and wear better when sliding, these gloves should last years.
the leatte knee shin is really great for terrain boarding, id leave the street abrasion to TSG DHP
further up and down the arm for elbows is fine, most forearm protectors slide as they dont have a good lock on the elbow - best bet is to just rock a leatte5.5. Just personal experience, Ill take road rash on the forearm over a broken wenis.
to pinching nerves… this is one part of gear I now use… covers chest, back, shoulders, arm, elbow, forearm… 
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