If you were personally able to kneel, you should have. The only people who are excused from kneeling in those situations are those who can not physically kneel in those situations.
Here is the official interpretation of the rubrics by the vatican on this matter:
*21. QUERY 3: In some places kneelers have been taken out of the churches. Thus, the people can only stand or sit and this detracts from the reverence and adoration due to the Eucharist.
REPLY: The appointments of a place of worship have some relationship to the customs of the particular locale. For example, in the East there are carpets; in the Roman basilicas, only since modern times, there are usually chairs without kneelers, so as to accommodate large crowds.* There is nothing to prevent the faithful from kneeling on the floor to show their adoration, no matter how uncomfortable this may be.* In cases where kneeling is not possible (see GIRM no. 21), a deep bow and a respectful bearing are signs of the reverence and adoration to be shown at the time of the consecration and communion: Not 14 (1978) 302-303, no. 4.