My writing skills are also lacking but I'll give it a shot…

Does the start of a new sequence present a way around this for that sequence's content?

The publishing of a sequence with new material may present an opportunity to perform rationality tests without the aforementioned difficulties.

The necessity and viability of having additional experimental controls, like a control group that just reports the measures, without reading the sequence will vary between sequences. But I think we will generally be fine with a simple before and after picture.

Whether additional experimental controls are necessary and/or viable will vary between sequences. For example, a control group could report their measurements without reading the sequence. Regardless, I think it is generally adequate to simply compare individual's measurements from before and after reading the sequence.

I guess I invoke Crocker's rules as well. Although, I think my sentences may be even worse…