Is it ok to hand off to dev typography specs in this convention and not H1 - H6

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As a UX/UI designer specific sizes for H1 - H3 cause issues so I prefer to use system shown on the left side of the image. Is this a problem in handoff? It creates much more flexibility. Thanks

I researched different approaches to typography and style guides(DSM's) to make my approach to design flexible and not locked in. I and wanted developers input.