No. I disagree.
A little more tension on the primary spring is generally no big deal, especially on a non-stock engine where its going to have more initial and little higher idle rpm.
I've welded up slots on the outside only to file them open and redo it on the inside.
If you want less spring tension, then adjust it-
With most points, the tach drive, and the mallory YH distributor, bend the spring perch.
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With typical Chrysler magnetic pickup distributors rotate the perch on its eccentric.
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Don't even need to disassemble it again.
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Less tension on the primary spring and the advance will begin at a lower rpm.