No, this sound was present prior to the new cockpit. Here's a 2013 post complaining about it, too. As with most high pitches, it probably bothers some people more than others. Some may not even hear it.
Sorry that I'm not parsing what you're saying clearly enough... Are you saying that the sound is accurately modeled/simulated?
Given the choice between accurate simulation and annoyance, I'll personally put up with the annoyance in order to get a taste of the real thing, though I wouldn't blame anyone who wants to silence this particular tone as a little 'quality of life' improvement. If the sound is erroneous, though, it would be nice to get it cleaned up and truer to the real deal, especially if that makes it friendlier to the ear.