Just received an email from Copa Airlines concerning changes to ConnectMiles:

• Expanding Availability for Upgrade Certificates: Global and Regional Upgrade Certificates issued to Platinum and Presidential Platinum PreferMembers will be valid in all fare classes on flights operated by Copa Airlines.

• Modifying Mileage Accrual: The accrual rate will be adjusted depending upon the family fare purchased.

• Modifying Baggage Allowance for Silver PreferMembers: The baggage allowance policy for Silver PreferMembers will be updated to allow 2 free checked bags of 50 lbs. (23 kg) each.

• Changing the Complimentary Upgrade Policy: On many flights, Gold, Platinum and Presidential Platinum PreferMembers will have more availability to complimentary upgrades when purchasing last minute tickets. Silver PreferMembers will receive upgrades on the day of departure based on availability.

• Changing Upgrade Rules on Economy Promo: All members regardless of PreferMember status, holding tickets issued in Economy Promo classes will receive complimentary upgrades subject to availability, only on the day of departure.

So definitely we will see accruals on the cheaper Y family tickets decrease. Hopefully they keep it to promo, but I'd fear they include the flex family too, which is the one I usually travel one.
The rest are minor changes I'd say. How many actually ever find Y promo tickets anyway?