It is too early to tell whether [Martin Schulz's] popularity is a “soap bubble” destined to pop, says Manfred Güllner of Forsa, another polling firm. As the former president of the European Parliament, Mr Schulz is well-known in Brussels, but he is still fresh in Berlin, untainted by domestic politics.
Yet his effect has been to awaken the base of a party that, like its centre-left cousins elsewhere in Europe, seemed to have lost its way. The SPD last won an election in 1998, when Gerhard Schröder became chancellor.
Here is my question.
The phrase "has been to" here is in present perfect tense, but this phrase is more commonly used equally as "has gone to" in sentence like “I have been to visit my mother twice this month”. So, to express an "effect " which has already happened, why bother the writer using the phrase “has been to awaken ” rather than using the more common expression "has awakened" to indicate a present perfect tense?