You're entitled to your opinion and so is everyone else. To refuse to tell detectives where a (as it turned out, dead) tiny baby is, IMO is reprehensible whatever performance or distraction tactic was used.
I don't believe he answered any questions regarding the location of the baby and this went on for a sustained period of time. I personally do not agree that he 'answered questions later', that is your opinion stated as fact which is not actually true or evidenced, therefore a distortion. He did answer some questions, many very evasively, and only after a) the body had been located and b) he'd been informed of what CM had already stated.
The best predictor of future behaviour is past behaviour. Therefore IMO anyone who speculates that MG would do similar on the stand is simply using straightforward logic. If you have a different idea, that's your personal take on it. The reality is none of us know how he will behave on the stand, if he takes it.
JMO MOO