"They were talking about it at the European Championships in Austria and Switzerland but it was a complete surprise to me," he told arsenal.com.
"I don't completely understand the reason behind that. It makes the qualifiers less interesting because you will have over 50 countries [competing] and 24 go through.
"I don't know the details. Will there will be one round more in the finals and they play a last 16 [round] to qualify? This means you will have 16 teams qualifying out of that 24 and that will make the [groups at the Finals] less interesting than this time.
"It looks like everybody, individually, understands the need to reduce the number of games but historically you always get more. It may be keeping everybody happy but I don't think it will raise the level of the competition."