Praise be to Allah.
What is obligatory is to follow that which is indicated by the evidence (daleel) of the Qur’aan and Sunnah, even if it differs from what the madhhab says. But it is essential to understand the Qur’aan and Sunnah as they were understood by the Salaf, and not only by our understanding of them. What is meant by the Salaf is the Sahaabah and the Taabi’een.
Concerning the example which you gave, touching a woman does not break wudoo’ at all, whether it is done with desire or not – because of the hadeeth that the Prophet (peace and blessings of Allaah be upon him) kissed one of his wives and then went out to pray, and he did not repeat his wudoo’. But if a man emits something (madhiy) because of desire, then he has to do wudoo’ – not because of the act of touching, but because something came out from him.
With regard to the aayah (interpretation of the meaning): “…or you have been in contact with [lit. touched] women…” [al-Maa’idah 5:6] – this is referring to sexual intercourse, according to the correct view.
2- There is no need to move from one madhhab to another. The obligatory duties of hajj should be performed as the Prophet (peace and blessings of Allaah be upon him) performed them, because he (peace and blessings of Allaah be upon him) said: “Take your rituals from me.”
The correct view concerning Qunoot in Fajr prayer is that it is Sunnah at times of calamity only, i.e., if a disaster has befallen the Muslims or some of them, then it is mustahabb to do Qunoot and to pray to Allaah to grant them relief. But under normal circumstances, the correct view is that this is not mustahabb, and this is what the daleel (evidence) refers to. So whoever does not do Qunoot, his prayer is still valid, even according to the Shaafa’is, may Allaah have mercy on them.
And Allaah knows best.