Number of EOs issued is a poor measure of centralization of power. Most exercise of executive power these days don't even require an EO, just a decree from one of the executive agencies. And looking at Trump vs Obama is myopic. This process has been going on continuously since at least the FDR admin.
Even in qualitative terms, the "consolidation" was incorrect. Congress abdicated its responsibilities, and the Federal agencies picked up the slack. They're not controlled _centrally_, it's not like Obama was ordering agencies to write particular rules.
We now see what the central consolidated control actually looks like.