Speaking for myself, the octave of Pentecost not only provides the ability to unite in a long-standing liturgical observance, it also provides a wonderful reminder and occasion to meditate upon the third person of the Holy Trinity.
I wrote about this subject last year in, Two Reforms Associated with Pentecost: The Vigil and the Octave which I will simply draw your attention to again this year. (And as the title suggests, a second point of liturgical discussion surrounding Pentecost is the reform of the Vigil of Pentecost in the usus antiquior, which was addressed in part seven of Gregory DiPippo's study on the 1955 Holy Week reforms, The Vigil of Pentecost and the Readings from Sacred Scripture in Holy Week.)
I am very grateful that its observance continues to be actively observed in the more ancient forms, but cannot but lament its absence in the modern form. It certainly is a question that needs to be looked at in any reform of the reform process.
If the Spirit so moves you, we would be interested in hearing your thoughts: