I have worked a lot with Genelec in studios, and never thought they were ´analytical´. It is anyways a problematic term, used by many audiophiles but not clearly defined, that is why I try to avoid it. But if you expect a studio monitor to clearly reveal all treble details at lower SPL, always allowing a judgement if a mix is either transparent, very present, partly aggressive, overly brillant or too distant/dull - well, I would not call Genelecs analytical or revealing at all. Under certain conditions, particularly untreated or midrange-heavy rooms, they do have a tendency of being forgiving, a bit ´dull-silky´ in audiophile´s terms.
Most of them do have a flat frequency response - on-axis! Off-axis many of them show a significantly narrowing radiation pattern, so underrepresented treble in the indirect soundfield of the room. That can go well under nearfield conditions or in certain studio control rooms, but sometimes it leads exactly to the character which was described.
This is certainly not true to all Genelecs under all circumstances, e.g. the 8341A I found to be a pretty capable tool and excellent speaker under nearfield conditions.
I dispute that. A potential explanation for not easily discovering flaws in the mix, lies in the room soundfield, not in the expectation of the engineer. Other studio monitors with a very similar on-axis response, give a much more detailed picture of imaging and treble.
Not always. We have to take into account that an imbalanced indirect soundfield does not just sound like dull reverb. It is also contributing to the additional reverb being perceived from wrong directions, being perceived as not a part of the mix, leaving comparably dry phantom sources in the mix ´holographic in a subjective vacuum´ and instruments with fairly enough reverb as overly distant. A resulting side effect for mixing engineers is the difficulty to judge the right amount of reverb or proximity for their mix.
Another aspect is that it is not as easy to judge the bass response with such speakers. If you are into electronic music and want to create some really punchy lower bass beats, you might find it difficult to judge it with speakers which always sound either bloated in certain bass bands, or on the edge of compression (like the smaller models).