If he had sided with Dycedarg, he might've actually achieved knighthood and probably won/inherited some sort of position in the army, as was the case back then. Alma never would have went to Orbonne to get kidnapped in the first place if Ramza wasn't a heretic, so I think she would probably have lived. Then again, Ramza was pretty dutiful about snuffing out the Zodiac demons before they could really wreak havoc on the country (I mean, people only know of rumors, after all), so that could escalate into a bigger problem than before. But, just how early was he supposed to have sided with Dycedarg -- Chapter One or later when all the events start occuring?