There seem to be quite a few that are critical of Lennon and his abilities, or maybe it's just a vocal minority thing again.
There were some stats floating around this summer comparing different (English I think) wingers in the PL showing that Lennon was pretty much the business. I couldn't find that particular image I had in mind, but I found a different one:
That was from the following article arguing that Lennon possibly should have been in the England squad:
http://www.eplindex.com/14760/aaron-lennon-england-squad-opta-stats.html There is another table there showing some of Lennon's defensive work. To me it's worth mentioning that he plays a somewhat deeper role than Walcott, Chamberlain and Johnson with more defensive responsibilities, to beat them in most of the important stats still goes some ways towards showing what he does bring to the team.
I think some of those people complaining that Lennon isn't doing enough for us going forward are comparing him to absolute world class players and have unrealistic expectations.