I believe ACCA will be still valuable but not as ISCA. As ISCA is trying to gain recognition with ICAEW. If it is able to achieve that it will surpass all other CPA/ACCA. However, currently SQP has not meet ICAEW Standard. And CA destination are considered higher level. For your information, in UK and Australia, Big 4 and mid tier firm encourage employees to pursue CA instead. To in line with international standard, Singapore gov is trying to do same thing. Therefore, SQP standard will always hard to obtain for CA level.