At least you have a first reading, most of the time OT, sometimes NT, for example during the Easter season, Acts. Then there is the Psalm, a second reading, from the NT letters, and then the Gospels. At least scripture is covered.
Roman Catholics cover only 13.5% of the OT if they attend Sundays and weekdays....3.7% if attend Sunday and Major Feasts.
For the NT the results are 71.5% and 40.8% respectively.
And this is important....this is after Vatican II.
Prior to Vatican II Roman Catholics only heard 16.5% of the NT and 1.0% of the OT.
http://catholic-resources.org/Lectionary/Statistics.htm