RM Cyradon will not contain any "options". It will contain the rules needed to play, nothing more.
The "conclusions" that we are attempting to draw from the playtesting are simple. That the rules are including are balanced and that they work well. And we do expect playtesters to adhere to the rules we post (i.e. what we WANT tested), at least during the playtesting period.
Now, there will be room in the playtesting for some customization, though we won't be offering any options in the RM Cyradon rules.
For example, you ask about Combat Companion. We are already including the professions, the armor as a single skill option/rule, and several combat styles built using the rules from Combat Companion.
If a playtester wanted to use the armor by the piece rules and the attack/combat table from Combat Companion, he could do so without disrupting the playtesting.