I'm currently having a problem in my one game where this one guy never finishes his turn. He takes it first usually and then doesn't end fortification ever. You should add in a thing so that if u've been at the fortification stage longer then like 10 minutes or something it finishes your turn for you cause this is getting to be a pain
yes it is a pain and should only ever be used to prevent others from using it
and if you could take your turn in Game 5254 more often the game could be won quicker
or go deadbeat giving me and bart more points make your mind up we are going to conquer asia and you are the only thing stopping us atm
About holding, its a good strategy in some team games. You can fortify your partner, he plays, fortify you, and you reorganize you troops again. This is not really related with the turn end.
Anyway, while there is no time limit for a player turn, its only an element of the game, a piece of the strategy, like intentional deadbeating if your partner in a doubles game doesnt show his face. So, if there are no problems, and isnt against rules, use it too, even for prevent the other players taking advantage from that.
If it is a standard game and there is double turns allowed then yes some people will use holding to their advantage. Just dont play "double turns allowed" games for now on.