Architecture is very subjective. It's one of those subjects where most of the time, the amount of work you do won't reflect your mark. 60% drop out rate from civil/arch to civil in 2nd year according to my friend. The amount of time you spend on arch is crazy. Pure arch is alright because less...
You actually never know how you'll go based on your class exams, assignments, etc. Your final plays a significant role so anything's possible at this stage.
My friend changed from Eng to Eng/Com via UAC after sem 1 so def apply! Also note there's no bonus points. If you didn't get at least close to the ATAR then IPT would be your next option.
Personally I went for MINE1010 & SOLA1070. No labs/no tutes & pretty interesting too. And MINE1010 is completely online for sem2 and summer. Both appealed to me just because there wasn't a lot of contact hours.