Yes, light springs are a bit of an adventure.
I'm using 14mm TX springs, which are considered "S" (Small). They are more gentle than Cherry 15mm springs.
62 G was considered an average weight for Ergo Clears back in the day, a bit on the light side, but they were using 15mm springs, a bit more powerful.
Honestly, the 62 G 14mm springs are fine for the 1U and most modifiers. However, the right-hand large Shift key does stick a little. Probably not the case with 62 G 15mm springs.
[If you were using 15mm springs, 62 G should be more than enough for all keys, except maybe the spacebar.]
With 14mm springs, you'd at least want to put a 63.5 G on the right-shift, and a 67 G on the spacebar, with all else being 62 G.
Ergo Clears aren't that tactile. The problem is 1. the bump size, which is more difficult to overcome on the upstroke compared with MX Brown.
2. Cherry switches are scratchy, the molds aren't as smooth as they should be. So there's more friction and resistance than there would be with a modern switch such as Naevy 1.5.
Granted, mine are lubed rather conservatively, the problem might be allieviated with the generous helping of lube that stock Cherry switches demand. I am looking forward to the official Ergo Clear switches. If they are built a bit better, they could be good to use with aftermarket springs.
[For further evidence of mid-range tactile sensitivity to spring weight, look into the JWK/Durock Penguin switches sold by Kinetic Labs. They are Durock Medium Tactiles sold without factory lube. They are said to NEED 63.5 G springs to operate properly, with 67 G on heavier keys. This has been my experience, as well. Penguins were modeled after Ergo Clears and Zealio V1, although their bump shape is different.]