Frenzied Beserker with Boots of Speed

[Corwin the Confused]

According to MotW a frenzying Frenzied Beserker

"...gains a +6 bonus to Strength and a single extra attack at each round at her highest bonus. (This latter effect is not cumulative with haste.)"

Given that, are there any advantages other than AC to a frenzying Frenzied Beserker with Boots of Speed?

 

[Crothian]

Extra partial action when you choose not to use that extra attack or in rounds you don't attack at all.