Have a care to those who wouldst bewitch with flummery and fine raiments, regard not the richness of the chef's tabard nor the gilding of his bowls but pay good heed to the quality of the meats that he doth serve within them, that they be sustaining and advantageous to your health and that of your guests.
see ..lots of long words ..like your designers "speech"/"advice" ..amounts to ..
decide your market..and customers ..design to it/them.
Hope you are not paying him by the word while he tries to work out what the brief entails.
what is "corporate flair" when it is at home ?..
Amazon use an inverted L with tabbed nav on the top..( the rest is their "add ons" )..love to see them try to patent that one and have it stand up to "prior art" even in the USA..you like it ? tweak it..
disclosure ..I've taught design at University level..probably before your designer was at junior school..they are good at MBA / Marketroid speak though..so as long as they aren't rolling reading or listening to it into the final bill ..let them continue ..
But..big But ..if you are in business already and don't already know what you do , who your market is , where they are etc ..and what will be the best way to reach them and make them react how you want ..and need a "designer" to make you aware of those things..you have more problems than the design of a website to worry about..in my experienced, considered, opinion..;-)