I wouldn't be concerned about that, you'll be able to change the assistance levels to settings that suit you, the less assistance of course and the greater the range.
Giant make good strong bikes and after over a thousand miles and a lot of hills I'm extremely pleased with the performance, build quality and component quality of mine as I think you will be with yours.
I'm 92 kilo, and pedal hard at times, there's no appreciable drive train wear though I do look after my bikes and keep them clean and lubricated.
I've been "electric" for several years starting with a front hub motor, then a rear hub and finally after a great deal of research the mid drive Giant which for my requirements is the one I prefer. I still use the rear hub bike (Woosh Kit), it's excellent and would certainly be many peoples first choice for commuting but having said that I would be happy to use the Giant as there isn't much effort required if the higher assist levels were used.
Andy is trying to be helpful and informative, he's never owned a mid drive but still of course entitled to his opinion though not gleaned from his personal experience.
There don't seem to be many Giant owners on the forum maybe we should start a Giant thread!
They will seem long days until your bike arrives
Dave.