Hello. I have searched for this suggestion to see whether or not it has been asked before, but couldn't find anything about it.
For a long time I have been bothered by the switchbar icons being too large and therefore making the buttons take up way too much space (for me). When having a lot of windows open my switchbar very quickly becomes cluttered. Therefore, I am suggesting that you implement an option to remove the icons from the switchbar, allowing the user to shrink the size of the buttons even further and just having the text there. Another nice feature would be the ability to colour the text of each window according to its type, e.g. status windows having blue text, queries being green and normal channels being red. When highlighted, the button text would instead of changing colours become bold.
I hope you take this suggestion into consideration.