There’s a lot of choice for a Cleric. You can just as easily become a cloistered, back-line support character that primarily casts spells to buff or protect their party, or build a militant war-priest that balances spell-casting with the traditional weaponry of their favored deity. Choosin...
Righteous Might if it allowed casting, for example, puts a Cloistered Cleric as effective martially as a Warpriest, but with better casting. Thus it's strictly better to use. Dragon form gives you huge manoeuvrability, a breath weapon for weaknesses, and improves your AC, HP via temp, ...