What were the disadvantages of the Roman Empire in Britain?

There were not many disadvantages from Roman rule in Britain.

The Romans revolutionised British agriculture. They introduced vegetables (asparagus, cabbages, carrots, celery, garlic, leeks, onions, peas, radishes, turnips, shallots) herbs (bay, basil, rosemary, thyme and savoury mint and herbs that were used in brewing and for medicinal purposes). They also introduced new and more productive grains which made bread became important in the British diet. They brought white cattle, brown hare, chickens, guinea fowl, pheasants, and rabbits were probably introduced as farmyard animals. The fruit they introduced included Apples (as opposed to crab Apples), grapes, cherries, mulberries and Pears. They also brought walnuts and sweet chestnuts

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The Romans also built roads, aqueducts, sewers, public toilets, public baths and public buildings. They also bought metals from the British mines and imported amphorae and olive oil. The Roman troops stationed in Britain bought food and goods from the locals. There were no recorded British rebellions after Boudicca's rebellion.