I know Saber is crazy cunning and strong but Beast is intelligent and strong. but here's the scenario:
1. Sabertooth enters and Beast sees him. They lock eyes and Saber says "may I have this dance?" Beast and him fight...
2. ONLY IF BEAST IS MANHANDLED, he's thrown and knocked unconscious. He wakes up moments later to see his entire team decimated..... He attacks fully enraged Ultimate Beast mode. Is there a difference?
Hey guys, why not Beast!! He is MUCH stronger than Creed. Even at his lowest point, Hank McCoy was firmly in the 3 - 5 ton range, and that was at least 3 upgrades ago. During his original blue furry phase he was able to throw down with classic Rogue.
Beast is also faster and more agile than Creed not to mention having manual dexterity in all for limbs. Beast can also use his claws (he does have claws) to walk up and cling to vertical surfaces. And while he doesn't have a healing factor on par with Logan and Creed, he's not far behind, healing from moderate damage in hours.
While no one is arguing that Creed is an overall better fighter, Beast has adapted a fighting style similar to Spider-Man's that allows him to take advantage of his speed, agility and ability to use both feet and hands.
Even With PIS removed, Creed has to get into melee range to hurt Beast and he cant do enough damage to McCoy before he gets an arm or leg completely ripped off and once that happens it's over for Creed.