It does actually help to avoid certain risks if you pay attention to orientration of the crown. I always forget which side is which, so i just put it in sideways, lol. I should probably pay more attention when planting 15-20 seeds it matters a bit more than when planting 1-4. You'll see the lower-risk issues in a batch of 20 every time vs seldomly with 1-4. same rate over time, but per any 1 batch, must less often with fewer opportunities.
if the shell ever remains on, consider how often it is happening. Depth you bury the seed will fix that, but if it's rare, i'd just accept it as inevitable. Depth you bury also impacts how long it takes to sprout, so there's a balance to find.
This is a study on corn but it will relate. One thing i'd point out is that if growing indoor, whatever 'loss' they speak of for a field crop of corn can easily be mitigated by simply giving an extra vege time, so it might cost slightly more electricity if it slows sprouting time, but any loss to yield can be mitigated with more vege time.
https://www.precisionplanting.com/resources/research/seed-orientation-study
A heat mat with a themorstate can increase consistency significantly. Before i used a heat mat, i had a much wider range of sprout times. If you see most of them sprout within 2-3 days, you're probably doing things well. Stragglers happen.. but i'd say expect at least 50% to sprout within 2-3 days. and 95-99% within 4-5 days. If it takes longer than that they are falling too far behind, in my opinion. YMMV on that.