Downwind to final turns

"It seems like I could shallow the bank"

That's the only thing I see in your posts that might be a concern - depending on how shallow a turn you mean. Writings by Tom Knauff and Derek Piggott as well as the standard procedure taught according to my national organization specify a well banked turn on base and final. The slow rate of turn in a shallow bank can encourage over application of rudder and we know where that can lead. It's also damn near impossible to get most gliders to stall from a well banked turn. In every one I've flown if you fly at the recommended minimum approach speed with full brakes (on many gliders denoted by the yellow triangle mark on the ASI these days) and then roll in to a 40 degree or so banked turn you can then pull the elevator back to the stop without provoking a stall - they run out of elevator authority before they come close to a stall. I've tried it in all the club gliders except the DG300 we just bought (haven't had a chance as it's usually being flown by someone else when I've finished flying my own ship)

At my field we don't have much room in the pattern because a 5000 foot high steep mountain ridge parallel to the runway is very close to the edge of the field. The result is that our base leg is pretty short, lasting not much more than a few seconds so we are almost doing a single 180 to final really. It's tight enough though that the turns have to be well banked. We've never once had a stall-spin on base/final in decades of operation even though our overall safety record is average at best. I sometimes wonder if the type of circuit forced upon us by geography might be part of the reason why.