It's going to cost a fair bit to upgrade so it is good enough until proven otherwise.
I have had 30 lb on mine for a few years and it has never broken, usually your knots, swivels or leaders break before braid or maybe your hooks straighten.
I only started with 125 yards of fireline and after tying a number of loops it is getting a bit short so I have just bought 300 metres of 50lb Finns, mostly because it was the same price as 30lb, so I thought why not, if it was dearer I would have stuck with 30lb.