Ok now I understand we you said the letters could be confusing. Indeed using the same letters for
- At least 2/3 (or ~67%) of rain occurs in summer (W aridity group, use threshold Tann*20+280)
- Between 1/3 to 2/3 (34-66%) of rain in summer (F aridity group, use threshold Tann*20+140)
- Less than 1/3 (~33%) of rain falls in summer (S aridity group, use threshold Tann*20)
as s,f,and w climates, doesn't make much sense since they are 2 different things.
I guess I'm just repeating you.
I personally don't really care how Koppen name them, if it's too confusing we should change the naming, assuming we keep them.
Arid
Average
Wet
West coast
Something (Faoofa?)
East coast (the dry summer is more prominent on east coasts, or the eastern sides of mountains in the case of Central Asia). it is the opposite for w pattern.
Now I remember I used to say precipitation pattern. For example, Brest in Brittany has a Cfb climate with a s pattern because the summer is drier than winter but not dry enough to qualify as a s climate.