Did you ever try lightweight full finger gloves? Just askin'. I have a pair of Troy Lees and a pair of Dakines. Like em both, but the Dakines fell apart pretty quickly.
I think the last time I wore half finger gel gloves was 1989.
I guess I would be willing to try full finger gloves for the summer but I was thinking of gel padding since I so occasionally get some numbness in my hands.
Some say that could be from gripping too tightly.
Gloves alone aren't going to cure numbness. Experiment with grip diameters, stem length, glove thickness. I even took the flat bars off my bike and got a 3/4 rise bar. Adjust the bars until they're comfortable. I'm running Lizard Skins Logo grips with a fairly thin glove and I have big hands. No numbness ever.