De La Rocque is basically regarded as a more authoritarian version of De Gaulle nowadays.From what I read he advocated a strong presidential office voted by universal suffrage, a lot of his policies were picked by de Gaulle after the liberation. He wasn't a fascist he even was a resistant during the war.
His Croix-de-feu were classified as a Far Right League but among those they were pretty calm and disciplined. De La Rocque was extremly critical of the Third Republic but he wanted to stay in the legality. The croix-de-feu did manifest on February 6, 1934 but they did so separately from other leagues, manifested calmly and dispersed peacefully on De La Rocque's orders. Other far right leaderss actually thought he betrayed them on that day while Léon Blum commented that if De La Rocque had pushed, the Assemblée Nationale would have been invaded.
Politically, his ideas are conservative but keep a Republican outlook. His main problem with the Third Republic, like De Gaulle, was the weakness of the executive compared to the legislative: he thus wanted a more presidential regime. And while conservative in terms of value, De La Rocque also did push for the more social aspects of christiannity he believed in: this is exemplified in the focus tree Gukpard shared by the fact he proposes a minimum wages, defend the creation of unions (though they're catholic and not syndicalists) and want to bridge the class divide. Note also that while conservartive, he advocates the right to vote for women.
Another aspect of De La Rocque that is often forgotten is that he was highly critical of totalitarian regimes. Not just of Communism, he also had no sympathies for Hitler or Mussolini. De La Rocque also had a tendency to fight other far right French leaders because of their defense of more extreme ideas, and tended to banish the more extreme elements of the Croix-de-feu and later PSF when he heard about them. Also important is that he was actively opposed to persecutions against the jews, something that is quite rare in the French Far Right at the time.
The man of course isn't perfect. He stayed with Vichy in 1940, though to be fair it's more out of legalism and loyalty to Pétain than a true approval of Vichy: he remained very critical of the collaboration. Still, he was no fan of De Gaulle and even when he did join the Résistance in 1941, he did so with one of the groups that wasn't under De Gaulle's leadership. The main reason for that being that De La Rocque's high anti-communism and his belief that De Gaulle had been collaborating with the communists from the start in his resistance movement. So he was definitely a bit less tolerant and pragmatic. You also can't completely discount his nationalism.
Basically, in Kaiserreich, he would probably fit better as a Social Conservative that borders on Authoritarian Democrat.