well, if u get a 2nd class lower, u wont be able to do ur masters. masters require a 3.00cgpa minimum or 2nd class upper. if u plan to get ur masters to "cover" ur results, then yes, u would need to mark up ur CGPA. the same as ur degree would cover ur SPM/STPM. that's IF ur SPM/STPM is good enough to get u into a degree course, right? if it didnt, what would u give to retake ur SPM/STPM?

it's not for perfectionists. in fact, we dont allow students to simply retake subjects that they didnt fail. they MUST fail the subjects first, and to my experience, hardly anyone would intentionally fail a subject so that they could retake them again without apparent reason.