I guess new one will be used only for PGTN side trains. So ideally there is less chance of confusion. People who are familiar with PGT, will go as they do previously(since SRR bound trains comes in 2 and 3 and CBE one in 4 and 5. Since 2,3 and 4,5 are in same platform, not an issue). People who are not familiar, will ideally go by checking platform number mentioned in stairs. So even ideally, they wont have problem.