If you are just cruising around, then raising the genoa up to the top of the furler will work if it makes it easier for you...
If you ever plan on racing though I'd make sure its down at deck level. The end plate of the deck is helpful to channel the air across the back of the main, it helps build pressure through the slot.
I feel your pain with large genoa with no window. It makes racing solo dangerous, and difficult with crew even. I ordered my last genoa without a window, and regretted it almost from day 1.
With crew, until you are heeling to say 15 degrees, you can station yourself or a crew member low side for lookout... until that point then having them move forward to the rail, near the shrouds, gives them a slightly better angle than the skipper. You still have a blind spot mind you, but its much smaller. With a larger crew, put the bowman at the chainplate, skipper at the traveler but in the cockpit, and genoa trimmer on the rail, at the winch, between skipper and bowman, you'll see nearly everything, sheeted in hard, and moving upwind.
Just reread... the genoa interface with the lifelines? You mean it's getting caught after a tack? I jib-roller like the ones from forespar help some... but honestly the biggest help is getting your timing down while tacking. Also a HUGE tip, that seems to go unsaid by many... to get a curled up genoa stuck on a lifeline... smack the leeward lifeline from the pit... it causes the foreward lifeline to wobble just enough to let the sail flop over it. Here's a stuck genoa...
We had just tacked and I hadn't fixed the genoa... cause we were 1 boat length to the line.
Same sail sheeted in properly unstuck from the lifelines.. yeah I know not a Capri 22... but same principle.