Answer to "unable to open my table"Try using something smaller than your finger to press the open key (button). A smaller object may help to press the key all the way in. Also try pressing the key closer to the left end & closer to the right end, instead of the middle of the key.
Answer to "Why do the blades spin much slower than they used to?"Sounds like the connection between the blades & the motor is worn. Separate the driven blades part from the driving motor part. Look at both the driving & the driven parts of that connection for wear & breakage. If there are broken/missing/severely worn parts of either connection, replace them. You may have to get a whole new section with the motor or a whole new section with the blades, if not both. If they both need replacement, just get another Cuisinart.