Banal is described as drearily commonplace and often predictable; trite.
In this photo when Pope Benedict visited Istanbul and participated in the Divine Liturgy with the Eastern Orthodox Patriarch, this is what Pope Benedict wore: surplice over street cassock, mozzetta with ermine and ornate papal stole:
Today, Pope Francis celebrated with the Eastern Orthodox Patriarch the same Divine Liturgy in the same Orthodox cathedral. However, he chose not to turn the house or street cassock of the pope into a liturgical one by donning the surplice, mozzetta and papal stole. No, he simply placed a plain, banal and ugly stole over his street clothes and the stole isn't even properly ironed! It looks simply slovenly:
I've said it before and I'll say it again, as a Jesuit, Pope Francis is still stuck in the 1970's liturgical milieu and the ethos of the Church as some kind of non-governmental organization (NGO) promoting social work. The social teachings of the Church are critical to being Catholic; but atheists could embrace Catholic Social teachings without belief in God. In fact social work without the belief in God or salvation exercised purely in an altruistic way out of concern for others seems more heroic than those who do it simply for a future reward in heaven.
But back to vestments. When I went into the seminary in 1976, the first thing I noticed was how austere the vestments were for Mass in the chapel. (When we had small group Masses in the priest's apartments in the seminary, they seldom wore vestments except with a stole over their clerical shirt.)
The vestments were full flowing but without any ornamentation. The theology then was to appear poor in a liturgical setting and that the vestment itself was the symbol and you don't put more symbols on a symbol. The later, in particular, is what I think Pope Francis continues to embrace in his vestments. His are very 1970's looking to me, especially the one he wore for his installation Mass.
The seminary also dispensed with the ornate candlesticks on the altar in favor of a pillar (one!) candle on it without a candlestick to hold it! The gold chalices and patens were replaced by earthenware ones and the cups looked to me like plant pots one would have at home.
There was a theology behind this, based upon puritanical simplicity that is alien to authentic Catholic theology and ethos for the Mass, what the Orthodox and Eastern Rites call the Divine Liturgy.
I wonder if the Orthodox or the Eastern Rites feel comfortable with a pope whose style of dressing his part evokes the 1970's banalities and liturgical "dumbdownedness" based on a false and erroneous humility of poverty? Would they want this Pope of Rome prescribing the vestments they should use and modelling it for them as Pope Francis did today?