First emboldened line - A team like Poland have qualified without any players I'd consider to be "top of the range" internationals. Qualification alone doesn't mean the players must be top class.
second emboldened line - A managers job is to get the best out of his players - even if they are not top of the range. A good manager getting the best out of the above players doesn't necessarily mean they are top of the line, it could just as easily mean the manager is top of the range.
I'd say the Irish team is a moderately talented team, which is quite good on the rare and inconsistent occasions when the team plays as a team.