grayway2 Why would it lacks the Snapdragon Elite 8 Gen 5 ?
I don't have a window into Motorola's decision-making process, but the cited article says "As for core specs, the Motorola Signature eschews the Snapdragon 8 Elite Gen 5 processor in favor of the less capable but still powerful Snapdragon 8 Gen 5 SoC". So regardless of why, "it" can't be that particular device.
grayway2 Motorola will eventually create a slightly different version of its Signature phone for GrapheneOS with the Snapdragon Elite 8 Gen 5 and MTE support once Qualcomm can manage to make it correctly working.
If so, perhaps the "slightly different version" will also have a secure element. Unless there is specific knowledge that it won't happen that way? If there is, sharing the specific information would arguably be more responsible than making alarmist projections about a "massive security downgrade".