It is simply covering a common need of a customer to adjust the height of bookmarks bar.
From a users perspective - not from programmers perspective. Height adjustment in Chrome as a setting I'm sure wouldn't be a huge problem.
Lets not head down the apple path of locking and restricting everything because some guy decides "one size fits all"
Google and open source products are great because they listen to customers and make products that are useful - if it isnt a major change.
If someone doesn't find this idea of a multi-row toolbar useful then why are they replying at all? There is plenty of people that use it in Firefox in some fashion and are thinking of switching to Chrome but they lie that "multi-row" feature.
With good coding and good design comes UX that is not filled with trash and performs well without the need to go over minimalist.
There is of course a balance. But as we have seen in this particular feature its not working too well as an extension and looks bloated and not right.
So, maybe, there might be a simpler way to add a setting that people can simply switch to add extra rows. (If they want to)
I'm glad Google understands that to run a successful business you must listen to your customers needs and at the same time balance ensuring a viable and useful product.
And from what I've seen so far they do act on "viable" ideas.
If they think this is a great idea then they will eventually add it.
I've been participating in the Chromium project and interacted with the developers.
They do an awesome job of prioritising and sometimes listening to feedback.
I suggest that others don't dismiss others opinions (eg: mine) - it's more constructive to share constructive feedback without trying to breakdown an entire discussion or someones work.