It's all been said by others from what I can see.
Tongues was for unbelieving Jews as a warning and with the destruction of the Temple, Israel's time was over so no more need for warning. Tongues was not a gift to bless the Church but to warn Israel, Isaiah prophesied the time would come and it did beginning with Pentecost and lasting about 40 years (a nice Biblical number
). As all God's gifts are good, the Church benefited when applied correctly. Unfortunately the Corinthians weren't doing a very good job of application which, is typical of many Churches today who think what they are doing is speaking in another language when all they do is babble. Thankfully for us though, the Corinthians blunder became God's opportunity to educate His bride.
1 Corinthians 14:21
In the law it is written: “With
men of other tongues and other lips I will speak to this people; And yet, for all that, they will not hear Me,” says the Lord.
Is.28:11&12
For with stammering lips and another tongue
He will speak to this people,
12 To whom He said, “This is the rest with which
You may cause the weary to rest,”
And, “This is the refreshing”;
Yet they would not hear.
The perfect is in the neuter gender and the Greek concept of perfect is "complete" or "mature" rather than our concept of "being without flaw", so the completion of scripture fits the understanding far better. Afterall, we will be throwing out the partial when the complete comes so if that is Christ? Which part of of Him do we have and why do we only have part of Him and why would we discard Him even in part?
It is completely illogical that the perfect should be Christ, but words of knowledge or prophecies needed at specific times when the Church was brand new, is far more likely as they would need instruction which, they did not have in writing as we have, on how to walk in this new life we have been given.