No, I do not believe that Jesus was evading the question. I believe that He deliberately did not answer because the disciples were not ready to receive the answer.
Think about the context of Acts 1:6. He has just spent 40 days with His disciples after His resurrection, teaching them about the kingdom of heaven. He was now ready to be received back to the Father and did not have time to address their misunderstanding about the nature of His kingdom.
Remember, He had already told them that His kingdom was not of this world.
Jesus answered, My kingdom is not of this world: if my kingdom were of
this world, then would my servants fight, that I should not be
delivered to the Jews: but now is my kingdom not from hence.
So after all this teaching, the disciples still could not receive the truth that the purpose of Christ’s coming was not to restore the earthly kingdom to Israel, which is why Jesus told them the parable of the nobleman.
Jesus proceeded to tell a parable, because he was near to Jerusalem, and because they [i.e., the people in general and the disciples in particular] thought that the kingdom of God was going to appear immediately. Therefore he said, “A nobleman went to a distant country to receive for himself a kingdom and then return" (emphasis has been added).
Had Jesus been any more explicit, his followers would have had difficulty understanding him.
I have yet many things to say unto you, but ye cannot bear them now.
In other words, Christ knew that the disciples would be slow in letting go of their Old Testament Covenant baggage. Jesus did tell them, however, they would soon have another teacher.
13 Howbeit when he, the Spirit of truth, is come, he will guide you
into all truth: for he shall not speak of himself; but whatsoever he
shall hear, that shall he speak: and he will shew you things to come.
In summary, Jesus was not evading the question. He understood that it would be long time before the disciples would be to fully able understand the NT covenant of grace. The Apostle Peter’s own words in 2 Peter 3 illustrated this fact, admitting that Paul’s teachings were “hard to understand”.
2 Peter 3:16
As also in all his (Paul’s) epistles, speaking in them of these
things; in which are some things hard to be understood, which they
that are unlearned and unstable wrest, as they do also the other
scriptures, unto their own destruction.