Tatkal coaches has been removed, as every coach & most intermediate station combiation has been asigned Tatkal Quota.
So logic of just one or two tatkal coach doesnt satisfy the criteria!!!
Just imagine,
1 Tatkal Coach (SL) = 72 Berth
30%...
more... Tatkal Quota (SL) = 10*72*.3=216
So, logically, now tatkal quota covers capacity equalling 3 SL Coaches(for 10 SL Coach Rake)