doctorbird
Agree many of your points. I too don't find the fulcrum point very helpful in trading warrants.
Re spread on low price - spreads do repay watching sometimes, they can narrow quite sharply on occasion, sometimes just prior to a move in the bid or offer price, can provide opportunities.
Market size - worth testing sometimes as it can be possible to deal at much greater than nms without a premium, you can always cancel the order if it moves against you, or set very tight limits.