Simple Fix - you may only cleave into a creature that is the closest to you and the creature that you dropped. If there a number of creatures equidistant beteween you and the creature you dropped, the character whirling and cleaving can choose.
It is not fair for the DM to rule that whirlwind attack can only be made in a clockwise or counter clock wise direction. First, it necessarily weakens the feat. Second, it would not make sense that the attack is at the highest BAB for every creature. The last of the eight bugbears will certainly be able to see it coming. Whirlwind attack is not the equivalent of Kenshin's succession technique. It merely gives one attack at the highest BAB vs. every opponent within 5'.
Further, if the DM were to rule the clock rule it would make more sense for it to effect cleave, then whirlwind attack. SImply rule that before every attack the character has to designate which direction he will go if he drops the opponent he is currently attacking. (This has its own problems, but is a better fix than the original)
It is not fair for the DM to rule that whirlwind attack can only be made in a clockwise or counter clock wise direction. First, it necessarily weakens the feat. Second, it would not make sense that the attack is at the highest BAB for every creature. The last of the eight bugbears will certainly be able to see it coming. Whirlwind attack is not the equivalent of Kenshin's succession technique. It merely gives one attack at the highest BAB vs. every opponent within 5'.
Further, if the DM were to rule the clock rule it would make more sense for it to effect cleave, then whirlwind attack. SImply rule that before every attack the character has to designate which direction he will go if he drops the opponent he is currently attacking. (This has its own problems, but is a better fix than the original)