I don't see why Leicester fans are worried.
Yes, Howarth for Lawson is a weakening, but for a while last season, heading towards the play-offs, Leicester were the strongest in the league.
Of course Ipswich are massively strong on paper. Clear favourites. But the other play-off sides are weakened similar to Leicester. Belle Vue with Zach Cook for Ben Cook, and Sheffield with Rowe for Howarth.
Leicester will still be thereabouts.