Sabah will have to wait. It will be Batu instead. Go for it. Batu, a bit of Bukit Bintang, walk about Pasir Sena and Chinatown... Petaling Street. Mmh, YUM.
A bit of petronas, the kl bird park walk through and meet friend at taman desa. Not bad
Off to Borneo from there- that's where the fun lies. Kuching it would be with side trips to the national parks and damai (santubong).