Farage I'm sure knows what his key weakness is with persuadable voters - the perception that Reform is a one man band with no team and no plan.
The plan is being worked on, and some of the recent defectors are important to that.
As far as the team goes... there are things a new party can self-generate like a branch structure or a better press operation, but when it comes to a shadow cabinet, you have to buy in talent. It's just a matter of whether you're buying in the right talent.
When Zahawi joined, some libertarian purists in Reform went "fuck no, not the vaccines minister" and there was a smattering of resignations, but Nigel knows two important things, (a) Zahawi is ideologically flexible but if you give him a job he'll do it well, and (b) he doesn't have to appeal to libertarian purists, he has to appeal to normie voters who'll go "oh that guy was the vaccines minister, that's something the Tories actually did a good job on".
Some of the defectors have me scratching my head, but I know you can't run a government made up entirely of people who've never been in government before. Besides, critics to Farage's right don't have a leg to stand on - Ben Habib's outfit is full of ex-Tories, starting with Ben himself, with a side order of ethnonationalist cranks.