Variations and dialects are fine, but the more they diverge from the common core, the less comprehensible they become to the wider speech community, so if the goal is to communicate to the wider community, then a very strong regional variation, whether it's Chinglish or a very regional English from the UK, will make communication more difficult. However, features of Chinglish may well pass into the wider community too. However, I think the general trend will be towards greater homogenisation simply to facilate global communication.
